CN111867308A - A circuit board that is easy to maintain and replace - Google Patents

Abstract

The invention discloses a circuit board convenient to maintain and replace, which comprises a connecting box body, a box body base, a combined circuit board and a connecting piece, wherein the top of the box body base is provided with the connecting box body through the connecting piece; the circuit board convenient to maintain and replace is characterized in that the circuit board is arranged in the connecting box body and the box body base, so that electronic elements on the circuit board are not in direct contact with the inner wall of the electric appliance box, the circuit board is not damaged when being arranged, and the damage rate of the circuit board is reduced; this circuit board of convenient maintenance change shifts out the combined circuit board who damages from the inner chamber of connecting box or box base, the combined circuit board of renewal, and the change process is convenient, only needs to change the combined circuit board who damages moreover, and the combined circuit board who does not damage need to be changed, has reduced the wasting of resources, has reduced cost of maintenance.

Description

A circuit board that is easy to maintain and replace

technical field

The invention relates to the field of circuit boards, in particular to a circuit board that is convenient for maintenance and replacement.

Background technique

Circuit boards are the basis of almost any electronic product, and appear in almost every electronic device. There are more than one circuit boards in some electronic devices. As we all know, at present, for two or more circuit boards (users can choose different functions. The module) connection is usually connected by a flat cable. When using a flat cable connection, both sides of the flat cable need their own plugs, and all the signals between the boards need to be connected.

The patent with the application number CN201821884174.9 discloses a circuit board with convenient replacement, which is convenient to replace, saves energy and reduces consumption, and improves practicability; it includes a basic function circuit board and an optional function circuit board, and the optional function circuit board includes the first function circuit board. an optional function circuit board, a second optional function circuit board and a third optional function circuit board, the basic function circuit board is provided with a first connection plug, a second connection plug and a third connection plug, the first optional circuit board The input end of the board is provided with a fourth connection plug, a fifth connection plug and a sixth connection plug, the output end of the first optional circuit board is provided with a seventh connection plug and an eighth connection plug, and the second optional function circuit board is provided with a seventh connection plug and an eighth connection plug. The input end is provided with a ninth connection plug and a tenth connection plug, the output end of the second optional function circuit board is provided with an eleventh connection plug, and the input end of the third optional function circuit board is provided with a twelfth connection plug, However, there are still the following shortcomings: the easily replaceable circuit board uses multiple connection plugs to make the modules in the circuit board easy to replace, but the basic function circuit board and optional function circuit board in the easily replaceable circuit board are wired When connecting, when the cables and circuit boards are damaged, all the cables and circuit boards must be disassembled and replaced, which is difficult to disassemble and waste of resources, and the basic function circuit boards and optional function circuit boards of the circuit boards that are easy to replace. The installation process is complicated and inconvenient to use.

Therefore, when how to improve the connection of two or more existing circuit boards, the installation process is complicated, the use is inconvenient, and it is easy to be damaged, and all circuit boards need to be replaced after being damaged, which is a great waste of resources, difficult to disassemble, and inconvenient for maintenance. replace.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a circuit board that is convenient for maintenance and replacement: (1) by moving the two combined circuit boards to the connection box and the box base, respectively, through the triangular slide rail and For the sliding connection of the triangular chute, take one end of the second inner joint as the front end, slide the two combined circuit boards into the inner cavity of the connection box and the box base respectively, and insert the second inner joint into one end of the outer joint. In the cavity, rotate the reinforcement plate, extend the card joint into the outer slot of the card connection, and connect with the inner slot of the card connection through the arc joint, contact the combined circuit board through the reinforcement plate and fix the combined circuit board, and connect several connecting pieces. The threaded rods are respectively screwed into several second installation holes on the bottom cover plate of the connection box, and the threaded rods are fixed by rotating the tightening nuts, and the direction of the positioning groove is fixed towards the positioning knob. Insert the connecting columns of the parts into the inner cavity of the first installation hole of the box base respectively, and rotate the positioning knob so that the end of the positioning knob enters the positioning groove to fix the connecting column, that is, the connecting box and the box base are connected. The two first inner connectors in the connector slot of the cable installation box, insert the two first inner connectors into one end of the outer connector connecting the box body and the box body base respectively, and connect the connecting box body and the box body base. Move it to the electrical box, put the connecting ear against the inner wall of the electrical box, and connect the electrical box and the connecting ear through bolts and connecting holes, which solves the problem of complicated installation process and inconvenience when connecting two or more circuit boards. The problem of being easily damaged; (2) By holding two elastic plates, squeeze the two elastic plates toward the limit plate, move the arc joint out of the inner slot of the clip, take out the clip joint from the outer slot of the clip, rotate Reinforcing plate, through the sliding connection between the triangular slide rail and the triangular chute, pull out the combined circuit board from the inner cavity of the connection box or box base, and select a new combination circuit board and insert it into the inner cavity of the connection box or box base , insert the second inner joint into the inner cavity of one end of the outer joint, rotate the reinforcing plate, extend the card joint into the outer slot of the clip, and connect with the inner slot of the clip through the arc joint, which solves the problem of the existing When two or more circuit boards are connected, all circuit boards need to be replaced after being damaged, which wastes resources, is difficult to disassemble, and is inconvenient for maintenance and replacement.

The object of the present invention can be realized through the following technical solutions:

A circuit board that is convenient for maintenance and replacement, including a connecting box, a box base, a combined circuit board and a connecting piece, a connecting box is installed on the top of the box base through the connecting piece, and the top of the connecting box is connected with the connecting piece. A top cover is installed, and a combined circuit board is installed inside the connection box and the box base;

Wherein, the connection box and the box base both include side sealing plates, bottom sealing plates and rear sealing plates, side sealing plates are vertically installed on both sides of the top of the bottom sealing plate, and one end of the bottom sealing plate is vertically installed at one end. The rear sealing plate, the two ends of the rear sealing plate are respectively connected to the ends of the two side sealing plates, the top of the side sealing plate and the rear sealing plate are provided with several first installation holes, Several positioning knobs are installed on the sealing plate, one end of the several positioning knobs is respectively located in the inner cavity of the several first installation holes, the inner side walls of the two side sealing plates are provided with triangular sliding grooves, one of the side One end of the sealing plate is rotatably connected with a reinforcing plate, the end of the reinforcing plate is provided with a snap joint, the other end of the side sealing plate is provided with an external snap groove, and an external joint is installed through the rear sealing plate;

Wherein, the combined circuit board includes a circuit board, a triangular slide rail, and a second inner joint, and a triangular slide rail is installed on both sides of the circuit board. The triangular slide rail and the triangular slide groove are slidably connected, and the circuit A second inner joint is installed at one end of the plate, and the second inner joint and the outer joint are mating members.

As a further solution of the present invention: a plurality of second installation holes are opened on the bottom cover plate of the connection box, and a plurality of the second installation holes are respectively communicated with a plurality of first installation holes, and the base of the box body is provided with a plurality of second installation holes. A plurality of connecting ears are installed on the four sides of the bottom sealing plate, and connecting holes are opened on the connecting ears.

As a further solution of the present invention: a cable installation box is installed on the outer side wall of the rear sealing plate of the connection box, the cable installation box is located directly below one end of the outer joint, and the top and bottom of the cable installation box are open There is a connector slot, a threading channel is opened in the inner cavity of the cable installation box, and the threading channel is communicated with the two connector slots. The first inner joints are connected by a cable, the cable is installed in the inner cavity of the threading channel, and the first inner joint and the outer joint are matching members.

As a further solution of the present invention: a fixing block is installed in the inner cavity of the outer joint, a plurality of connecting posts are installed equidistantly through the fixing block, and the inner cavity of the first inner joint and the second inner joint are provided with openings. There are several wiring holes, and several of the wiring posts are respectively inserted into the inner cavities connected to the several wiring holes.

As a further solution of the present invention: the inner side of the side sealing plate is provided with a clamping inner groove on the inner side of the clamping outer groove, and the clamping joint includes a connecting block, an elastic plate, an arc joint and a limit plate. Elastic plates are installed on the top and bottom of the side, an arc joint is installed at one end of the elastic plate away from the connection block, a limit plate is installed in the middle of one side of the connection block, and the two elastic plates are symmetrically distributed about the limit plate, and the two One of the elastic plates and the outer clamping groove are matching components, and the two arc joints and the inner clamping groove are matching components.

As a further solution of the present invention: the connecting piece includes a threaded rod, a fastening nut, a connecting column, and a positioning groove, the bottom end of the threaded rod is connected with a connecting column, and the threaded rod is threadedly sleeved with a fastening nut, so The connecting column is provided with a positioning groove, the threaded rod and the second mounting hole are matching members, the connecting column and the first mounting hole are matching members, and the positioning groove and the positioning knob are matching members.

As a further scheme of the present invention: the installation process of the circuit board that is convenient for maintenance and replacement is as follows:

Step 1: Move the two combined circuit boards to the connection box and the box base, respectively, and connect the two combined circuit boards through the sliding connection between the triangular slide rail and the triangular chute, with one end of the second inner joint as the front end, respectively sliding into the inner cavity connecting the box body and the box body base, and inserting the second inner joint into the inner cavity of one end of the outer joint;

Step 2: Rotate the reinforcement plate, extend the card connector into the outer slot of the card connection, and connect with the inner slot of the card connection through the arc joint, contact the combined circuit board through the reinforcement plate and fix the combined circuit board;

Step 3: Screw the threaded rods of several connectors into several second installation holes on the bottom cover plate of the connection box, fix the threaded rods by rotating the fastening nuts, and fix the direction of the positioning groove Facing the positioning knob, insert the connecting posts of several connectors into the inner cavity of the first installation hole of the box base respectively, and rotate the positioning knob, so that the end of the positioning knob enters the positioning groove to fix the connecting posts, and the box is about to be connected. , Box base connection;

Step 4: Take out the two first inner connectors in the connector slot of the cable installation box, and insert the two first inner connectors into one end of the outer connector connecting the box body and the box body base respectively;

Step 5: Move the connected connection box and box base to the electrical box, put the connecting ears against the inner wall of the electrical box, and connect the electrical box and the connecting ears through bolts and connecting holes, which completes the circuit that is convenient for maintenance and replacement. board installation process.

As a further scheme of the present invention: the replacement process of the circuit board that is convenient for maintenance and replacement is as follows:

Step 1: Hold two elastic plates, squeeze the two elastic plates against the limit plate, move the arc joint out of the inner slot of the snap connection, take out the clip joint from the outer slot of the snap joint, rotate the reinforcement plate, and pass the triangular slide rail The sliding connection with the triangular chute, the combined circuit board is pulled out from the inner cavity of the connection box or the box base;

Step 2: Select a new combined circuit board and insert it into the inner cavity of the connection box or box base, insert the second inner connector into the inner cavity of one end of the outer connector, rotate the reinforcing plate, and extend the card connector to the outside of the card connection. In the groove, the arc joint is clamped with the inner groove of the clamping connection, and the replacement process of the circuit board which is convenient for maintenance and replacement is completed.

Beneficial effects of the present invention:

(1) A circuit board that is convenient for maintenance and replacement of the present invention, by moving the two combined circuit boards to the connection box body and the box body base, respectively, through the sliding connection between the triangular sliding rail and the triangular sliding groove, with the second inner One end of the connector is the front end, slide the two combined circuit boards into the inner cavity connecting the box body and the box body base respectively, and insert the second inner connector into the inner cavity of one end of the outer connector, rotate the reinforcement plate, and extend the card connector. Insert it into the outer slot of the clip, connect it with the inner slot of the clip through the arc joint, contact the combined circuit board through the reinforcing plate and fix the combined circuit board, and screw the threaded rods of several connectors into the connecting box respectively. In the several second installation holes on the bottom cover plate, the threaded rod is fixed by rotating the fastening nut, and the direction of the positioning groove is fixed towards the positioning knob, and the connecting columns of several connecting pieces are respectively inserted into the box base. In the inner cavity of the first installation hole, rotate the positioning knob, so that the end of the positioning knob enters the positioning groove to fix the connecting column, that is, the connection box and the box base are connected. Take out two of the connector slots of the cable installation box. For the first inner connector, insert the two first inner connectors into one end of the outer connector connecting the box body and the box body base respectively, move the connected connection box body and the box body base to the electrical box, and put the connecting ears tightly against each other. On the inner wall of the electrical box, the electrical box is connected with the connecting ears through bolts and connecting holes; the circuit board that is convenient for maintenance and replacement is installed in the connecting box and the box base, so that the electronic components on the circuit board are not connected to the electrical box. The inner wall is in direct contact, so that the circuit board will not be damaged during installation, which reduces the damage rate of the circuit board;

(2) In a circuit board of the present invention, which is convenient for maintenance and replacement, by holding two elastic plates, pressing the two elastic plates toward the limit plate, moving the arc joint out of the inner groove of the clamping, and removing the clamping joint from the clamping Take it out from the outer groove, rotate the reinforcing plate, and pull out the combined circuit board from the connecting box or the inner cavity of the box base through the sliding connection between the triangular slide rail and the triangular sliding groove, and select a new combined circuit board and insert it into the connecting box or Insert the second inner joint into the inner cavity of one end of the outer joint, rotate the reinforcing plate, and extend the card joint into the outer slot of the box, and then connect with the inner slot of the clip through the arc joint. ; The circuit board which is convenient for maintenance and replacement is connected by connecting the second inner joints on the two circuit boards with one end of the two outer joints respectively, the other ends of the two outer joints are respectively connected with the first inner joint, and between the two first inner joints Cable connection, so that the damaged combination circuit board is removed from the inner cavity of the connection box or the box base, and the new combination circuit board is replaced. The replacement process is convenient, and only the damaged combination circuit board needs to be replaced. The circuit board does not need to be replaced, which reduces the waste of resources and reduces the maintenance cost.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

1 is a schematic structural diagram of a circuit board that is convenient for maintenance and replacement in the present invention;

Fig. 2 is the structural representation of the box base in the present invention;

Fig. 3 is the bottom view of the bottom cover plate of the connection box in the present invention;

Fig. 4 is the rear view of the box base in the present invention;

5 is a schematic diagram of the internal structure of the cable installation box in the present invention;

6 is a schematic diagram of the internal structure of the external joint in the present invention;

Fig. 7 is the connection schematic diagram of the first inner joint and the cable in the present invention;

Figure 8 is a side view of the first inner joint of the present invention;

Fig. 9 is the structural representation of the card joint in the present invention;

Figure 10 is a schematic diagram of the connection between the clamping outer groove and the clamping inner groove in the present invention;

Fig. 11 is the structural representation of the composite circuit board in the present invention;

FIG. 12 is a schematic diagram of the structure of the connector in the present invention.

In the figure: 100, connection box; 200, box base; 300, combined circuit board; 400, top cover; 201, side cover; 202, bottom cover; 203, rear cover; 204, terminal; 205, outer joint; 206, first installation hole; 207, reinforcement plate; 208, snap joint; 209, triangular chute; 210, connecting hole; 211, snap-on outer slot; 212, connecting ear; 213, positioning knob; 214, the second installation hole; 215, the cable installation box; 216, the connector slot; 217, the threading channel; 218, the fixing block; 219, the first inner connector; 220, the cable; block; 223, elastic plate; 224, arc joint; 225, limit plate; 226, clip inner groove; 301, circuit board; 302, triangular slide rail; 303, second inner joint; 501, threaded rod; 502 , Fastening nut; 503, connecting column; 504, positioning groove.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

1-12, this embodiment is a circuit board that is convenient for maintenance and replacement, including a connection box 100, a box base 200, a combined circuit board 300, and a connector. The top of the box base 200 is connected by A connection box 100 is installed on the top of the connection box 100, a top cover 400 is installed on the top of the connection box 100 through the connection piece, and a combined circuit board 300 is installed inside the connection box 100 and the box base 200;

The connection box 100 and the box base 200 both include a side sealing plate 201, a bottom sealing plate 202, and a rear sealing plate 203. Side sealing plates 201 are vertically installed on both sides of the top of the bottom sealing plate 202. A rear sealing plate 203 is vertically installed at one end of the top of the sealing plate 202, and the two ends of the rear sealing plate 203 are respectively connected to the ends of the two side sealing plates 201. There are several first installation holes 206, several positioning knobs 213 are installed on the side sealing plate 201 and the rear sealing plate 203, and one end of the several positioning knobs 213 is respectively located in the inner cavity of the several first installation holes 206. The inner side wall of the side sealing plate 201 is provided with a triangular chute 209, one end of the side sealing plate 201 is rotatably connected with a reinforcing plate 207, the end of the reinforcing plate 207 is installed with a snap joint 208, and the other side The end of the sealing plate 201 is provided with a clamping outer groove 211, and an outer joint 205 is installed through the rear sealing plate 203;

The combined circuit board 300 includes a circuit board 301 , a triangular slide rail 302 , and a second inner joint 303 , the circuit board 301 is provided with a triangular slide rail 302 on both sides, and the triangular slide rail 302 is connected to the triangular slide groove 209 A second inner joint 303 is installed on one end of the circuit board 301, and the second inner joint 303 and the outer joint 205 are mating members.

The bottom sealing plate 202 of the connection box 100 is provided with a plurality of second installation holes 214, and the plurality of second installation holes 214 are respectively communicated with a plurality of first installation holes 206. The bottom of the box base 200 A plurality of connecting ears 212 are installed on four sides of the sealing plate 202 , and connecting holes 210 are formed on the connecting ears 212 .

A cable installation box 215 is installed on the outer side wall of the rear sealing plate 203 of the connection box 100. The cable installation box 215 is located directly below one end of the outer joint 205. The connector slot 216, a threading channel 217 is opened in the inner cavity of the cable installation box 215, and the threading channel 217 is communicated with the two connector slots 216, and the two connector slots 216 are clipped with a first The inner joint 219, the two first inner joints 219 are connected by a cable 220, the cable 220 is installed in the inner cavity of the threading channel 217, the first inner joint 219 and the outer joint 205 are mating members .

A fixing block 218 is installed in the inner cavity of the outer joint 205 , and a plurality of connecting posts 204 are installed equidistantly through the fixing block 218 . The inner cavity of the first inner joint 219 and the second inner joint 303 are provided with A plurality of wiring holes 221 , and a plurality of the wiring posts 204 are respectively inserted into the cavities connected to the plurality of wiring holes 221 .

The side sealing plate 201 is provided with a clamping inner groove 226 on the inner side of the clamping outer groove 211. The clamping joint 208 includes a connecting block 222, an elastic plate 223, an arc joint 224, and a limit plate 225. The connecting block An elastic plate 223 is installed on the top and bottom of one side of the 222, an arc joint 224 is installed at one end of the elastic plate 223 away from the connecting block 222, a limiting plate 225 is installed in the middle of one side of the connecting block 222, and two elastic plates are installed. 223 are symmetrically distributed with respect to the limiting plate 225 , the two elastic plates 223 and the outer snap groove 211 are mating members, and the two arc joints 224 and the inner snap groove 226 are mating members.

The connecting piece includes a threaded rod 501, a tightening nut 502, a connecting column 503, and a positioning groove 504. A connecting column 503 is connected to the bottom end of the threaded rod 501, and a tightening nut 502 is threadedly sleeved on the threaded rod 501. The connecting column 503 is provided with a positioning groove 504, the threaded rod 501 and the second mounting hole 214 are matching components, the connecting column 503 and the first mounting hole 206 are matching components, the positioning groove 504 and the positioning knob 213 is a matching member.

Referring to Figure 1-12, the installation process of a circuit board that is convenient for maintenance and replacement in this embodiment is as follows:

Step 1: Move the two combined circuit boards 300 to the connection box 100 and the box base 200 respectively, and connect the triangular slide rail 302 to the triangular slide groove 209 through sliding connection. The two combined circuit boards 300 are respectively slid into the inner cavity of the connection box 100 and the box base 200, and the second inner connector 303 is inserted into the inner cavity of one end of the outer connector 205;

Step 2: Rotate the reinforcing plate 207, extend the snap joint 208 into the snap joint outer slot 211, and engage with the clip joint inner slot 226 through the arc joint 224, contact the combined circuit board 300 through the stiffening plate 207 and connect the combined circuit board 300 fixed;

Step 3: Screw the threaded rods 501 of the plurality of connectors into the plurality of second installation holes 214 on the bottom sealing plate 202 of the connection box 100 respectively, and fix the threaded rods 501 by rotating the fastening nuts 502, and Fix the direction of the positioning groove 504 towards the positioning knob 213, insert the connecting posts 503 of several connectors into the inner cavity of the first installation hole 206 of the box base 200, and rotate the positioning knob 213 to make the end of the positioning knob 213 Enter the positioning groove 504 to fix the connection post 503, that is, to connect the box body 100 and the box body base 200;

Step 4: Take out the two first inner joints 219 in the joint slot 216 of the cable installation box 215, and insert the two first inner joints 219 into one end of the outer joint 205 connecting the box 100 and the box base 200 respectively superior;

Step 5: Move the connected connection box 100 and the box base 200 into the electrical box, attach the connecting ears 212 to the inner wall of the electrical box, and connect the electrical box with the connecting ears 212 through bolts and connecting holes 210. Facilitates the installation process of the circuit board for maintenance and replacement.

Referring to Figure 1-12, the replacement process of a circuit board that is convenient for maintenance and replacement in this embodiment is as follows:

Step 1: Hold the two elastic plates 223, squeeze the two elastic plates 223 against the limit plate 225, move the arc joint 224 out of the inner slot 226, take out the joint 208 from the outer slot 211, rotate The reinforcing plate 207, through the sliding connection between the triangular sliding rail 302 and the triangular sliding groove 209, pulls out the combined circuit board 300 from the inner cavity of the connection box 100 or the box base 200;

Step 2: Select a new combined circuit board 300 and insert it into the inner cavity of the connection box 100 or the box base 200, insert the second inner connector 303 into the inner cavity of one end of the outer 208 protrudes into the clamping outer groove 211, and is clamped with the clamping inner groove 226 through the arc joint 224, which completes the replacement process of the circuit board which is convenient for maintenance and replacement.

In the description of this specification, description with reference to the terms "one embodiment," "example," "specific example," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention. in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above contents are only examples and descriptions of the present invention, and those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the invention or exceed the present rights The scope defined by the claims shall all belong to the protection scope of the present invention.

Claims (8)

1. The circuit board convenient to maintain and replace is characterized by comprising a connecting box body (100), a box body base (200), a combined circuit board (300) and a connecting piece, wherein the top of the box body base (200) is provided with the connecting box body (100) through the connecting piece, the top of the connecting box body (100) is provided with a top sealing cover (400) through the connecting piece, and the combined circuit board (300) is arranged in the connecting box body (100) and the box body base (200);

wherein the connecting box body (100) and the box body base (200) both comprise side sealing plates (201), bottom sealing plates (202) and a rear sealing plate (203), the side sealing plates (201) are vertically arranged on two sides of the top of the bottom sealing plate (202), the rear sealing plate (203) is vertically arranged at one end of the top of the bottom sealing plate (202), two ends of the rear sealing plate (203) are respectively connected to the end parts of the two side sealing plates (201), a plurality of first mounting holes (206) are respectively arranged on the top of the side sealing plates (201) and the top of the rear sealing plate (203), a plurality of positioning knobs (213) are arranged on the side sealing plates (201) and the rear sealing plate (203), one ends of the plurality of positioning knobs (213) are respectively positioned in the inner cavities of the plurality of first mounting holes (206), triangular sliding grooves (209) are arranged on the inner side walls of the two side sealing plates (201), one end of one, a clamping joint (208) is installed at the end part of the reinforcing plate (207), a clamping outer groove (211) is formed in the end part of the other side sealing plate (201), and an outer joint (205) is installed on the rear sealing plate (203) in a penetrating mode;

the combined circuit board (300) comprises a circuit board (301), a triangular sliding rail (302) and a second inner joint (303), wherein the triangular sliding rail (302) is mounted on two sides of the circuit board (301), the triangular sliding rail (302) is connected with the triangular sliding groove (209) in a sliding mode, the second inner joint (303) is mounted at one end of the circuit board (301), and the second inner joint (303) and the outer joint (205) are matched components.

2. The circuit board convenient for maintenance and replacement as claimed in claim 1, wherein a plurality of second mounting holes (214) are formed in the bottom sealing plate (202) of the connection box body (100), the plurality of second mounting holes (214) are respectively communicated with the plurality of first mounting holes (206), a plurality of engaging lugs (212) are mounted on four sides of the bottom sealing plate (202) of the box body base (200), and the engaging lugs (212) are formed with connecting holes (210).

3. The circuit board convenient to maintain and replace according to claim 1, wherein a flat cable installation box (215) is installed on an outer side wall of a rear sealing plate (203) of the connection box body (100), the flat cable installation box (215) is located right below one end of an external connector (205), connector clamping grooves (216) are formed in the top and the bottom of the flat cable installation box (215), a threading channel (217) is formed in an inner cavity of the flat cable installation box (215), the threading channel (217) is communicated with the two connector clamping grooves (216), first inner connectors (219) are clamped in the two connector clamping grooves (216), the two first inner connectors (219) are connected through a flat cable (220), the flat cable (220) is installed in an inner cavity of the threading channel (217), and the first inner connectors (219) and the external connector (205) are matched members.

4. The circuit board convenient to maintain and replace according to claim 3, wherein a fixed block (218) is installed in an inner cavity of the outer connector (205), a plurality of binding posts (204) are installed in the fixed block (218) in an equidistant penetrating manner, a plurality of wiring holes (221) are respectively formed in inner cavities of the first inner connector (219) and the second inner connector (303), and a plurality of binding posts (204) are respectively inserted into inner cavities connected to the plurality of wiring holes (221).

5. The circuit board convenient to maintain and replace according to claim 1, wherein a clamping inner groove (226) is formed in the side sealing plate (201) on the inner side of the clamping outer groove (211), the clamping joint (208) comprises a connecting block (222), an elastic plate (223), an arc-shaped joint (224) and a limiting plate (225), the elastic plate (223) is mounted at the top and the bottom of one side of the connecting block (222), the arc-shaped joint (224) is mounted at one end, away from the connecting block (222), of the elastic plate (223), the limiting plate (225) is mounted in the middle of one side of the connecting block (222), the two elastic plates (223) are symmetrically distributed relative to the limiting plate (225), the two elastic plates (223) and the clamping outer groove (211) are matched components, and the two arc-shaped joints (224) and the clamping inner groove (226) are matched components.

6. The circuit board convenient to maintain and replace according to claim 1, wherein the connecting piece comprises a threaded rod (501), a fastening nut (502), a connecting column (503) and a positioning groove (504), the bottom end of the threaded rod (501) is connected with the connecting column (503), the fastening nut (502) is sleeved on the threaded rod (501) in a threaded manner, the positioning groove (504) is formed in the connecting column (503), the threaded rod (501) and the second mounting hole (214) are matched components, the connecting column (503) and the first mounting hole (206) are matched components, and the positioning groove (504) and the positioning knob (213) are matched components.

7. The easy-to-repair-replace circuit board according to claim 1, wherein the easy-to-repair-replace circuit board is installed by the following steps:

the method comprises the following steps: the two combined circuit boards (300) are respectively moved to the connecting box body (100) and the box body base (200), the two combined circuit boards (300) are respectively slid into the inner cavities of the connecting box body (100) and the box body base (200) by the sliding connection of the triangular sliding rails (302) and the triangular sliding grooves (209) and taking one end of the second inner joint (303) as the front end, and the second inner joint (303) is inserted into the inner cavity of one end of the outer joint (205);

step two: rotating the reinforcing plate (207), extending the clamping joint (208) into the clamping outer groove (211), clamping the clamping joint with the clamping inner groove (226) through the arc joint (224), contacting the combined circuit board (300) through the reinforcing plate (207) and fixing the combined circuit board (300);

step three: the threaded rods (501) of a plurality of connecting pieces are respectively screwed into a plurality of second mounting holes (214) on a bottom sealing plate (202) of a connecting box body (100), the threaded rods (501) are fixed by screwing fastening nuts (502), the direction of a positioning groove (504) is fixed towards a positioning knob (213), connecting columns (503) of a plurality of connecting pieces are respectively inserted into the inner cavity of a first mounting hole (206) of a box body base (200), and the positioning knob (213) is screwed, so that the end part of the positioning knob (213) enters the positioning groove (504) to fix the connecting columns (503), and the box body (100) and the box body base (200) are connected;

step four: taking out two first inner connectors (219) in the connector clamping grooves (216) of the flat cable installation box (215), and respectively inserting the two first inner connectors (219) into one ends of outer connectors (205) connected with the box body (100) and the box body base (200);

step five: the connected connection box body (100) and the box body base (200) are moved into the electric appliance box, the connecting lug (212) is tightly attached to the inner wall of the electric appliance box, the electric appliance box is connected with the connecting lug (212) through the bolt and the connecting hole (210), and the installation process of the circuit board convenient to maintain and replace is completed.

8. The easy-to-repair-replace circuit board according to claim 1, wherein the easy-to-repair-replace circuit board is replaced by the following steps:

the method comprises the following steps: the two elastic plates (223) are held by hands, the two elastic plates (223) are extruded towards the limiting plate (225), the arc-shaped joint (224) is moved out of the clamping inner groove (226), the clamping joint (208) is taken out of the clamping outer groove (211), the reinforcing plate (207) is rotated, and the combined circuit board (300) is drawn out of an inner cavity of the connecting box body (100) or the box body base (200) through the sliding connection of the triangular sliding rail (302) and the triangular sliding groove (209);

step two: and selecting a new combined circuit board (300) to be inserted into an inner cavity of the connecting box body (100) or the box body base (200), inserting the second inner joint (303) into an inner cavity at one end of the outer joint (205), rotating the reinforcing plate (207), extending the clamping joint (208) into the clamping outer groove (211), and clamping the arc-shaped joint (224) and the clamping inner groove (226), thereby completing the replacement process of the circuit board convenient to maintain and replace.

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