CN212280628U - Chair back frame connecting structure - Google Patents
Chair back frame connecting structure Download PDFInfo
- Publication number
- CN212280628U CN212280628U CN202021038011.6U CN202021038011U CN212280628U CN 212280628 U CN212280628 U CN 212280628U CN 202021038011 U CN202021038011 U CN 202021038011U CN 212280628 U CN212280628 U CN 212280628U
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- Prior art keywords
- fixing
- connecting block
- screw
- hole
- chair frame
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- 238000009434 installation Methods 0.000 claims description 49
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
A chair back frame connecting structure comprises two parallel mounting parts arranged on a chair back frame, a fixing part arranged on a chair seat and a connecting block, wherein the left side and the right side of the connecting block are respectively provided with a left mounting position and a right mounting position; a locking through hole for a locking screw to penetrate through the mounting part is formed in the side surface of the mounting part, and first screw hole structures in threaded fit with the locking screw are arranged in the left mounting position and the right mounting position; the bottom of the connecting block is provided with a fixing position, and the fixing part is connected and arranged in the fixing position; the fixing part is provided with a fixing hole for a fixing screw to pass through the fixing part, and the top of the connecting block is provided with a second screw hole structure which is communicated with the fixing position and is in threaded fit with the fixing screw. The end part of the mounting part is inserted into the left mounting position and the right mounting position and is fixed by the locking screw, welding is replaced by a threaded connection mode, the structure is simple, the production cost is effectively reduced, and the attractiveness of the chair back frame after mounting is ensured.
Description
Technical Field
The utility model relates to a connection structure of chair parts, concretely relates to back of chair frame connection structure.
Background
As shown in fig. 10, currently, in order to ensure the stability and the beauty of the back frame of the office chair 10, most of the back frames 10 of the office chairs are made of metal pipes bent into an L-shaped section, the lower part of the back frame 10 made of the structure is provided with two parallel mounting parts 1, a connecting part for connecting with a fixing part 2 of a chair seat 20 is arranged between the two mounting parts 1, and the connecting part is composed of a cross bar 30 and a connecting plate 40; when the chair back frame is manufactured, the cross rod 30 is welded between the two mounting parts 1, then the connecting plate 40 is welded on the cross rod 30, and then the welding position is polished to obtain a finished chair back frame 10; then, the screw is connected with the fixing part 2 of the seat 20 through the through hole on the connecting plate 40, so as to complete the connection and installation of the back frame 10 on the seat 20.
However, as can be seen from the above process of manufacturing the seat back frame 10, the cross bar 30 and the connecting plate 40 are both fixed by welding and polished after welding, which results in many processes and high production cost; therefore, it is necessary to improve the structure of the connecting back frame 10 to reduce the production cost.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a chair back frame connecting structure.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a back of chair frame connection structure, is including setting up installation department, the fixed part of setting on the seat support of two parallel arrangement on the back of chair frame, its characterized in that: the connecting block is characterized by further comprising a connecting block, wherein the left side and the right side of the connecting block are respectively provided with a left mounting position and a right mounting position, and the two mounting parts are respectively embedded and mounted in the left mounting position and the right mounting position; a locking through hole for a locking screw to penetrate through the mounting part is formed in the side surface of the mounting part, and first screw hole structures in threaded fit with the locking screw are arranged in the left mounting position and the right mounting position; the bottom of the connecting block is provided with a fixing position, and the fixing part is connected and arranged in the fixing position; the fixing part is provided with a fixing hole for a fixing screw to penetrate through the fixing part, and the top of the connecting block is provided with a second screw hole structure which is communicated with the fixing position and is in threaded fit with the fixing screw.
The utility model discloses in, all be equipped with location portion in left side installation position and the right side installation position, be equipped with the positioning groove chamber on the tip of installation department, location portion inserts in the positioning groove chamber.
The utility model discloses in, location portion is gradually expanding boss, and its diameter begins to increase gradually to the one end of being connected with the connecting block by the one end of not being connected with the connecting block.
The utility model discloses in, be equipped with at least one positioning slot in the fixed position, be equipped with the location inserted sheet that can insert in the positioning slot on the fixed part at least.
The utility model discloses in, be equipped with a plurality of first light grooves that are located fixed position on the connecting block.
The utility model discloses in, be equipped with at least one second light groove that is located the fixed position on the connecting block.
The utility model discloses in, all be equipped with first connecting hole in left side installation position and the right installation position, the top of connecting block is equipped with the first position of placing of the first connecting hole of intercommunication, the lock nut of its screw corresponding first connecting hole has been placed in the first position of placing, first connecting hole, first position, lock nut of placing form first screw structure.
The utility model discloses in, be equipped with the second connecting hole in the fixed position, the position is placed to the second that is equipped with intercommunication second connecting hole on the top of connecting block, the second is placed and is placed the fixation nut that its screw corresponds the second connecting hole in the position, second connecting hole, second are placed the position, fixation nut forms second screw structure.
The utility model discloses in, left side installation position and right side installation position all have with connecting block integrated into one piece's last clamping part and lower clamping part, go up the clamping part and press respectively on the upper and lower both ends of installation department with lower clamping part.
The utility model discloses in, the tip of installation department inserts and installs in left installation position and the right installation position to with locking screw fixed, replace the welding with the threaded connection mode, simple structure effectively reduction in production cost guarantees simultaneously that the back of the chair frame is installed beautifully. Furthermore, structures which have a limiting effect on the mounting parts are arranged in the left mounting position and the right mounting position, so that the chair back frame cannot be loosened after being connected with the connecting block; and the fixing position is also internally provided with a structure which has a limiting effect on the fixing part, so that the chair back frame cannot deform after being fixed on the chair seat through the connecting block, and the use quality and the comfort level of the chair are ensured.
Drawings
The invention will be further explained with reference to the drawings and the embodiments below:
FIG. 1 is an exploded view of the present embodiment in a left-hand direction;
FIG. 2 is an exploded view of another angle of the present embodiment;
FIG. 3 is a schematic view of the combination state of the present embodiment;
FIG. 4 is a perspective view of the connector block;
FIG. 5 is a rear view of the connector block;
FIG. 6 is a schematic view of the structure A-A of FIG. 5;
FIG. 7 is a front view of the connector block;
FIG. 8 is a top view of the connector block;
FIG. 9 is a schematic view of B-B of FIG. 8;
fig. 10 is a schematic view of a connection structure of a conventional seat back frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
Referring to fig. 1 to 9, a chair back frame connecting structure includes two parallel mounting portions 1 disposed on a chair back frame 10, a fixing portion 2 disposed on a chair seat 20, and a connecting block 3 integrally formed by injection molding. Further, the left and right sides of connecting block 3 is equipped with left installation position 4 and right installation position 5 respectively, and two installation departments 1 are embedded into respectively and are installed in left installation position 4 and right installation position 5, and when two installation departments 1 were embedded into left installation position 4 and right installation position 5 respectively, the outside of two installation departments 1 was parallel and level respectively in the left and right sides of connecting block 3 to improve the aesthetic property after the installation.
Still further, be equipped with the locking through-hole 1a that supplies locking screw to pass installation department 1 on the side of installation department 1, all be equipped with in left side installation position 4 and the right side installation position 5 with locking screw thread fit's first screw structure. The first screw hole structure can be screw holes arranged in the left mounting position 4 and the right mounting position 5; in this embodiment, in order to ensure the stability of the locking screw after being tightened, the first screw hole structure is configured as follows: all be equipped with first connecting hole 3b in left side installation position 4 and the right installation position 5, the top of connecting block 3 is equipped with the first position 3c of placing of the first connecting hole 3b of intercommunication, place its screw in the first position 3c and correspond the lock nut of first connecting hole 3b, first position 3c, the lock nut of placing form first screw structure. Furthermore, a first positioning structure for limiting the rotation of the locking nut is arranged in the first placing position 3c so as to improve the stability of the locking nut
Furthermore, a fixing position 6 is arranged at the bottom of the connecting block 3, and the fixing part 2 is connected and installed in the fixing position 6; the fixing part 2 is provided with a fixing hole 2a for a fixing screw to pass through the fixing part 2, and the top of the connecting block 3 is provided with a second screw hole structure which is communicated with the fixing position 6 and is in threaded fit with the fixing screw. The second screw hole structure can be screw holes arranged in the left mounting position 4 and the right mounting position 5; in the embodiment, in order to ensure the stability of the fastening screw after being tightened, the second screw hole structure is arranged as follows: all be equipped with second connecting hole 3d in left side installation position 4 and the right installation position 5, the top of connecting block 3 is equipped with the second of intercommunication second connecting hole 3d and places position 3e, place the fixation nut that its screw corresponds second connecting hole 3d in the position 3e is placed to the second, second connecting hole 3d, second place position 3e, fixation nut form the second screw structure. Furthermore, a second positioning structure for limiting the rotation of the fixing nut is arranged in the second placing position 3e so as to improve the stability of the fixing nut.
Preferably, all be equipped with in left side installation position 4 and the right side installation position 5 with connecting block 3 integrated into one piece's location portion 7, be equipped with the positioning groove chamber on the tip of installation department 1, location portion 7 inserts in the positioning groove chamber to carry on spacingly to installation department 1, strengthen the stability that back of the chair frame 10 installed on connecting block 3. Furthermore, the positioning portion 7 is a gradually expanding boss, and the diameter of the boss gradually increases from the end not connected with the connecting block 3 to the end connected with the connecting block 3, so that the positioning portion 7 is inserted into the positioning groove cavity, and the assembly efficiency is improved. Meanwhile, in order to reduce the weight and the production cost of the joint block 3, the positioning portion 7 is provided with a third lightweight groove 3 f.
Preferably, at least one positioning slot 6a is arranged in the fixing position 6, and at least one positioning insertion piece 2b capable of being inserted into the positioning slot 6a is arranged on the fixing part 2 so as to enhance the stability of connection between the fixing part 2 and the connecting block 3; in this embodiment, two positioning slots 6a respectively located at the left end and the right end of the fixing portion 6 are arranged in the fixing portion 6, two positioning insertion pieces 2b are arranged on the fixing portion 2, and the two positioning insertion pieces 2b are respectively inserted into the two positioning slots 6a, so that the connecting block 3 is prevented from shaking after being connected and fixed with the fixing portion 2; the two positioning insertion pieces 2b are respectively arranged at the left end and the right end of the fixing part 2, so that the two positioning insertion pieces 2b and the fixing part 2 form a U-shaped structure.
Preferably, in order to reduce the weight and the production cost of the connecting block 3, a plurality of first lightweight grooves 8 are arranged on the connecting block 3 and positioned in the fixing positions 6; the connecting block 3 is provided with at least one second light groove 9 positioned outside the fixing position 6.
Preferably, left side installation position 4 and right side installation position 5 all have with connecting block 3 integrated into one piece's last clamping part and lower clamping part, go up the clamping part and press respectively on the upper and lower both ends of installation department 1 with lower clamping part to centre gripping installation department 1, and then improve the stability after installation department 1 is connected with connecting block 3.
The above description is only the preferred embodiment of the present invention, and the technical solutions of the objects of the present invention are all within the protection scope of the present invention as long as the objects are achieved by the substantially same means.
Claims (9)
1. The utility model provides a back of chair frame connection structure, is including setting up installation department (1) of two parallel arrangement on back of chair frame (10), setting fixed part (2) on seat support (20), its characterized in that: the connecting device is characterized by further comprising a connecting block (3), wherein a left mounting position (4) and a right mounting position (5) are respectively arranged on the left side and the right side of the connecting block (3), and the two mounting parts (1) are respectively embedded into the left mounting position (4) and the right mounting position (5); a locking through hole (1 a) for a locking screw to penetrate through the mounting part (1) is formed in the side surface of the mounting part (1), and first screw hole structures in threaded fit with the locking screw are arranged in the left mounting position (4) and the right mounting position (5); the bottom of the connecting block (3) is provided with a fixing position (6), and the fixing part (2) is connected and installed in the fixing position (6); the fixing part (2) is provided with a fixing hole (2 a) for a fixing screw to penetrate through the fixing part (2), and the top of the connecting block (3) is provided with a second screw hole structure which is communicated with the fixing position (6) and is in threaded fit with the fixing screw.
2. A back-of-chair frame connecting structure as claimed in claim 1, wherein: all be equipped with location portion (7) in left side installation position (4) and right side installation position (5), be equipped with the positioning groove chamber on the tip of installation department (1), location portion (7) insert in the positioning groove chamber.
3. A back-of-chair frame connecting structure as claimed in claim 2, wherein: the positioning part (7) is a gradually-expanding boss, and the diameter of the positioning part is gradually increased from one end which is not connected with the connecting block (3) to one end which is connected with the connecting block (3).
4. A back-of-chair frame connecting structure as claimed in claim 1, wherein: be equipped with at least one location slot (6 a) in fixed position (6), be equipped with at least one location inserted sheet (2 b) that can insert in location slot (6 a) on fixed part (2).
5. A back-of-chair frame connecting structure as claimed in claim 1, wherein: the connecting block (3) is provided with a plurality of first light grooves (8) positioned in the fixing positions (6).
6. A back-of-chair frame connecting structure as claimed in claim 1, wherein: and at least one second light groove (9) positioned outside the fixed position (6) is arranged on the connecting block (3).
7. A back-of-chair frame connecting structure as claimed in claim 1, wherein: all be equipped with first connecting hole (3 b) in left side installation position (4) and the right installation position (5), the top of connecting block (3) is equipped with the first position (3 c) of putting of first connecting hole (3 b) of intercommunication, the first lock nut who has placed its screw in position (3 c) and correspond first connecting hole (3 b), first position (3 c), lock nut of putting form first screw structure.
8. A back-of-chair frame connecting structure as claimed in claim 1, wherein: be equipped with second connecting hole (3 d) in fixed position (6), it places position (3 e) to be equipped with the second that communicates second connecting hole (3 d) on the top of connecting block (3), the second is placed and is placed the fixation nut that its screw corresponds second connecting hole (3 d) in position (3 e), second connecting hole (3 d), second are placed position (3 e), fixation nut and are formed the second screw structure.
9. A back-of-chair frame connecting structure as claimed in claim 1, wherein: left side installation position (4) and right side installation position (5) all have with connecting block (3) integrated into one piece's last clamping part and clamping part down, go up the clamping part and press respectively on the upper and lower both ends of installation department (1) with clamping part down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021038011.6U CN212280628U (en) | 2020-06-08 | 2020-06-08 | Chair back frame connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021038011.6U CN212280628U (en) | 2020-06-08 | 2020-06-08 | Chair back frame connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212280628U true CN212280628U (en) | 2021-01-05 |
Family
ID=73939468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021038011.6U Active CN212280628U (en) | 2020-06-08 | 2020-06-08 | Chair back frame connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212280628U (en) |
-
2020
- 2020-06-08 CN CN202021038011.6U patent/CN212280628U/en active Active
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