CN204204703U - A kind of switch using torsion spring to be terminal - Google Patents

Abstract

The utility model discloses a switch using a torsion spring as a terminal, which comprises an upper cover, a base, a fixed terminal, a movable terminal and a pressing part. On the guide post, the upper end exposes the upper cover for pressing, the upper cover is fastened with the base to form a cavity in the middle, the fixed terminal and the movable terminal are arranged in the cavity, and one end of the fixed terminal and the movable terminal both pass through the base and the external circuit Connection, the movable terminal is a torsion spring, which is installed on the base and located on one side of the fixed terminal; one end of the torsion spring passes through the base for line connection, this end is fixed with the base, and the other end of the torsion spring is controlled by the pressing piece as an action arm Used to make contact with fixed terminals. Compared with the prior art, the utility model uses the torsion spring as the movable terminal structure, and its good elasticity can make the switch using the torsion spring as the terminal have a better feel, and the manufacturing cost of the torsion spring is lower, and the structure is more Simple, Longer Life.

Description

A switch using a torsion spring as a terminal

technical field

The utility model relates to an electronic switch, in particular to a switch using a torsion spring as a terminal.

Background technique

Many operations of existing devices require the use of key switches as input means. The quality of the key switch determines the experience of the input device, and it is necessary to ensure a good feel and service life. The existing key switch adopts the movable contact piece made of metal sheet. Due to the limitation of the internal space of the switch, the strength of the metal sheet is relatively insufficient, which affects the feel and life of the key.

Utility model content

In view of this, the problem to be solved by the utility model is: to provide a switch using a torsion spring as a terminal with good hand feel, long life, simple structure and low manufacturing cost.

In order to solve the above problems, the utility model adopts the following technical solutions: a switch using a torsion spring as a terminal, including an upper cover, a base, a fixed terminal, a movable terminal and a pressing piece, the base is provided with a guide post, and the pressing piece is connected Installed on the guide post with the return spring sleeved, the upper end exposes the upper cover for pressing, the upper cover is fastened with the base to form a cavity in the middle, the fixed terminal and the movable terminal are arranged in the cavity, and the fixed terminal and the movable terminal are connected. One end passes through the base to connect with the external circuit; the movable terminal moves up and down to control the contact and disconnection between the movable terminal and the fixed terminal. The movable terminal is a torsion spring, which is installed on the base at the One side of the fixed terminal; one end of the torsion spring passes through the base for line connection.

Preferably, the pressing member extends at least one protrusion toward the movable terminal, and when the pressing member moves up and down, the protrusion pushes the action arm to move to realize contact with or disconnect from the fixed terminal.

Preferably, the fixed terminal includes a contact end, and the contact end is arranged vertically to the base, and the pressing piece controls the action arm to move back and forth so that the action arm and the contact end realize front and rear disconnection or contact.

Preferably, the fixed terminal further includes a mounting portion, the mounting portion is provided with a through hole, and the fixed terminal is sleeved on the guide post through the through hole to achieve fixation, and one end of the mounting portion is bent and passed through the outside of the base to form a pin. The other end is bent and extended upwards to form a contact end.

Preferably, the base is provided with a torsion spring fixing post perpendicular to the bottom surface of the base to facilitate the forward and backward rotation of the torsion spring action arm, and the torsion spring is installed and fixed on the torsion spring fixing post.

Preferably, the action arm of the torsion spring extends from the upper end of the torsion spring parallel to the bottom surface of the base at a position higher than the level of the contact end, and extends out of the first action arm, and bends vertically downward at the protrusion of the pressing piece, extending The second action support arm is formed below the level of the contact end, then vertically bent and extended to the lower part of the contact end to form the third action support arm, and then bent upward so that the end extends to the front end of the contact end to form a front and rear opposite to the fixed terminal The fourth arm forms an unclosed word-shaped structure.

Preferably, the fixed terminal includes a contact end, the contact end is arranged parallel to the base, and the pressing piece controls the action arm to move up and down so that the contact of the action arm is disconnected or contacted with the contact end.

Preferably, the fixed terminal further includes a mounting portion, the mounting portion is provided with a through hole, and the fixed terminal is sleeved on the guide post through the through hole to achieve fixation, and one end of the mounting portion is bent and passed through the outside of the base to form a pin. The other end extends in parallel to form a contact end.

Preferably, the base is provided with a mounting groove, and the torsion spring is laterally fixed in the mounting groove.

Preferably, the action arm of the torsion spring extends from one end of the torsion spring to the direction of the fixed terminal to form a fifth action arm, and a sixth action arm parallel to the bottom surface of the base is bent on the upper part of the protrusion. The six-action support arm is located on the upper part of the protrusion and is pushed by the protrusion to move up and down, and finally bends and extends to the upper end of the contact to form a seventh action support arm vertically opposite to the static contact.

Compared with the prior art, the beneficial effect of the utility model is that the torsion spring is used as the movable terminal structure, and its good elasticity can make the switch using the torsion spring as the terminal have a better feel, and the manufacturing cost of the torsion spring is lower. The metal sheet is lower, the structure is simpler, and the service life is longer, which improves the use experience of the switch using the torsion spring as the terminal, and has a good application prospect.

Description of drawings

Fig. 1 is an exploded schematic diagram of the overall structure of the switch embodiment 1 using a torsion spring as a terminal according to the utility model;

Fig. 2 is a schematic structural diagram of the movable terminal of the switch embodiment 1 using the torsion spring as the terminal according to the utility model;

Fig. 3 is a schematic diagram of the internal structure of the combined state of the switch embodiment 1 using the torsion spring as the terminal according to the utility model;

Fig. 4 is an exploded schematic diagram of the overall structure of the switch embodiment 2 using a torsion spring as a terminal according to the utility model;

Fig. 5 is a schematic structural diagram of the movable terminal of the second embodiment of the switch using torsion spring as the terminal according to the utility model;

Fig. 6 is the internal structure diagram of the combined state of the switch embodiment 2 using the torsion spring as the terminal according to the utility model;

Fig. 7 is an exploded schematic diagram of the overall structure of the switch embodiment 3 using torsion springs as terminals according to the utility model;

Fig. 8 is a schematic structural diagram of the movable terminal of the third embodiment of the switch using torsion spring as the terminal according to the present invention;

Fig. 9 is a schematic diagram of the internal structure of the combined state of the switch embodiment 3 using the torsion spring as the terminal according to the utility model;

Fig. 10 is a schematic structural diagram of the combined state of the switch embodiment 1-2 using the torsion spring as the terminal of the utility model.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Example 1

Figure 1 is an exploded view of the overall structure of Embodiment 1. As shown in Figure 1, the switch using the torsion spring as the terminal of the utility model includes an upper cover 1, a base 2, a pressing member 5, a return spring 6, and a movable terminal 4 and the fixed terminal 3, the upper cover 1 is provided with a plurality of button holes 11, and the base 2 is provided with a card position 22 corresponding to the button holes 11 of the upper cover 1, and the upper cover 1 and the base 2 are connected to the card through the button holes 11. The cooperation of the position 22 can be buckled, and after the buckling, a cavity is formed between the upper cover 1 and the base 2 for placing the pressing member 5, the return spring 6, the movable terminal 4 and the fixed terminal 3. The base 2 is provided with a guide post 21 , the lower part of the guide post 21 extends out of the bottom of the base 2 , the return spring 6 is sleeved on the outside of the guide post 21 , and a guide hole is provided in the middle of the guide post 21 . And this pressing part 5 bottom is provided with positioning bar, and pressing part 5 can realize depressing and bouncing by the back-moving spring 6 between pressing part 5 and base 2 by passing positioning bar into guide hole, pressing part 5 four sides There is also a guide groove between the base 2. When the pressing part 5 is pressed down or reset by the return spring 6, the pressing part 5 moves up and down along the guide groove, and the upper part of the pressing part 5 passes through the upper cover 1 to connect to the external The keycap and the pressing part 5 are also provided with at least one protrusion 51, and the front end of the protrusion 51 is provided with a slope surface. When the pressing part 5 moves up and down, the protrusion 51 will push the torsion spring action arm to swing back and forth to achieve the connection with the fixed terminal. 3 contact or disconnect. Preferably, the base 2 is also provided with a fixed bead 7 for button installation. The fixed bead 7 is in an inverted U shape, and both ends pass through the base 2 to be connected and fixed with other hardware.

In Embodiment 1, the fixed terminal 3 and the movable terminal 4 are fixed on the base 2, wherein the fixed terminal 3 includes a pin end 31 welded and fixed with an external circuit, and a mounting part 32 for fixing the fixed terminal 3 on the guide post 21 And the contact end 33 which is in contact with the movable terminal 4 . The mounting part 32 is provided with a through hole that can be sleeved on the guide post 21, one end of which is bent and extended upwards and perpendicular to the mounting part 32 to contact the contact end 33 for front and back contact with the action arm, and the other end is a pin end 31 is bent to pass through the outside of the base 2, and the fixed terminal 3 is sleeved on the guide post 21 through the through hole to be fixed. Preferably, the contact is a columnar contact so that it can better contact the movable terminal 4 . The movable terminal 4 is a torsion spring, and the base 2 is provided with a torsion spring fixing column 23 perpendicular to the bottom surface of the base 2. The torsion spring is installed and fixed on the torsion spring fixing column 23, and one end extends out to swing back and forth and can be connected with The action arm that is in contact with the contact end 33 of the fixed terminal 3 is used to be pushed by the slope of the protrusion 51 of the pressing member 5 to realize connection or disconnection with the static contact. The other end is the pin end 410, which wears Out base 2 is connected with external circuit.

As shown in Figure 2, in Embodiment 1, the action arm of the torsion spring extends out of the first action support arm 411 from the upper end of the torsion spring that is higher than the level of the contact end 33 and extends parallel to the bottom surface of the base 2, and presses The protrusion 51 of the piece 5 is bent vertically downward, extending below the level of the contact end 33 to form the second action support arm 412, and then vertically bent and extending to the directly lower part of the contact end 33 to form the third action support arm 413, and then Bending upwards makes the end extend to the front end of the contact end 33 to form the fourth action support arm 414 , forming an unclosed square structure.

As shown in Figure 3, a protrusion 51 is provided on the edge of the lower part of the pressing part 5 opposite to the position of the second action support arm. 5. The lower part of the slope surface of the protrusion 51 is in contact with the slope surface. Because of the slope surface, the second action support arm 412 is pushed away by the slope surface of the protrusion 51. The action arm of the movable terminal 4 is separated from the contact of the fixed terminal 3, and the connection is disconnected. No signal is generated; when the pressing member 5 is manually pressed, the lower edge of the second action support arm 412 slides along the slope to the upper part of the slope of the protrusion 51 of the pressing member 5, and the end of the action arm contacts the contact of the fixed terminal 3 , the connection is turned on, and a key signal is generated.

Example 2

Figure 4 is an exploded view of the overall structure of Embodiment 2. As shown in Figure 4, Embodiment 2 is the same as Embodiment 1, including the upper cover 1, the base 2, the pressing member 5, the return spring 6, the movable terminal 4 and the fixed terminal 3. There is a button hole 11 at the left and right ends of the upper cover 1, and two button holes 11 are provided at the lower part, and the base 2 is provided with a card position 22 corresponding to the button hole 11 of the upper cover 1. The upper cover 1 and the base 2 can be fastened through the cooperation of the button hole 11 and the card position 22. After the fastening, a space is formed between the upper cover 1 and the base 2 for placing the pressing part 5, the return spring 6, the movable terminal 4 and the fixed terminal 3. cavity. The base 2 is provided with a guide post 21, one end of the guide post 21 is fixed on the base 2, the other end is connected and fixed with the lower part of the pressing member 5, and the return spring 6 is sleeved on the guide post 21 between the base 2 and the pressing member 5, pressing The upper part of the part 5 passes through the upper cover 1 to connect the external keycap, and at least one protrusion 51 is also provided. When the pressing part 5 moves up and down, the protrusion 51 will push the action arm of the torsion spring to make it swing up and down to realize and fix it Terminal 3 is contacted or disconnected.

The fixed terminal 3 and the movable terminal 4 are fixed on the base 2, wherein the fixed terminal 3 includes a pin end 31 welded and fixed with an external circuit, a mounting part 32 for fixing the fixed terminal 3 on the guide post 21 and a movable The contact terminal 33 that the terminal 4 contacts. There is a through hole in the middle of the mounting part 32 for the guide post 21 to pass through, and the fixed terminal 3 can be fixed on the bottom surface of the base 2 by the return pressing action of the return spring 6 after the guide post 21 passes through the through hole. At one end of the mounting part 32, a contact end 33 that is arranged on the bottom surface of the base 2 and is opposite to the action arm up and down extends horizontally. The upper part of the contact end 33 is provided with a columnar contact that is placed upwards, so as to make contact with the action arm up and down. There is a mounting groove on the right side of the front end of the base 2 located at the contact end 33. The mounting groove is surrounded by three positioning walls and the edge of the base 2. The size is just enough to place the main body of the torsion spring in it, and the torsion spring is fixed with the upper cover 1. at the front end of the contact end 33 of the fixed terminal 3 .

As shown in FIG. 5 , the action arm of the torsion spring extends from the right end of the torsion spring toward the fixed terminal 3 to form a fifth action arm 421 . The sixth action arm 422 is located on the upper part of the protrusion 51. When the pressing member 5 moves up and down, the protrusion can push the sixth action arm to move up and down, and finally bend and extend to the upper end of the contact to form a The seventh action support arm 423 with the static contact facing up and down, the torsion spring also includes a pin end 420, which passes through the outside of the base 2 from one end of the torsion spring and is connected to an external circuit.

As shown in Figure 6, a protrusion 51 is provided on the edge of the lower part of the pressing part 5 opposite to the position of the sixth action support arm 422. The upper part of the protrusion 51 of the part 5 contacts, because of the elastic action of the return spring 6, the sixth action support arm is pushed away by the upper part of the protrusion 51, and the action arm of the movable terminal 4 is separated from the contact of the fixed terminal 3, and the connection is disconnected. Generate a signal; when the pressing piece 5 is manually pressed, the elasticity of the action arm is close to the upper part of the protrusion 51 of the pressing piece 5 and moves downward with the pressing of the pressing piece 5, and the end of the action arm contacts the contact of the fixed terminal 3 , the connection is turned on, and a key signal is generated.

Example 3

Figure 7 is an exploded view of the overall structure of Embodiment 3. As shown in Figure 7, Embodiment 3 is the same as Embodiment 2, including the upper cover 1, the base 2, the pressing member 5, the return spring 6, the movable terminal 4 and the fixed terminal 3. There is a button hole 11 at the left and right ends of the upper cover 1, and two button holes 11 are provided at the lower part, and the base 2 is provided with a card position 22 corresponding to the button hole 11 of the upper cover 1. The upper cover 1 and the base 2 can be fastened through the cooperation of the button hole 11 and the card position 22. After the fastening, a space is formed between the upper cover 1 and the base 2 for placing the pressing part 5, the return spring 6, the movable terminal 4 and the fixed terminal 3. cavity. The base 2 is provided with a guide post 21, one end of the guide post 21 is fixed on the base 2, the other end is connected and fixed with the lower part of the pressing member 5, and the return spring 6 is sleeved on the guide post 21 between the base 2 and the pressing member 5, pressing The upper part of the part 5 passes through the upper cover 1 to connect the external keycap, and at least one protrusion 51 is also provided. When the pressing part 5 moves up and down, the protrusion 51 will push the action arm of the torsion spring to make it swing up and down to realize and fix it Terminal 3 is contacted or disconnected.

The fixed terminal 3 and the movable terminal 4 are fixed on the base 2, wherein the fixed terminal 3 is a square metal sheet, which is arranged on the other side of the base in front of the fixed terminal where the torsion spring is placed, and includes a tube welded and fixed with the external circuit. The foot end 31 and the contact end 33 which is in contact with the movable terminal 4 . Described contact end 33 this contact end 33 upper part is provided with the columnar contact that places upwards, is convenient to carry out up and down contact with action arm, and its one end also extends out pin end 31, and this pin end 31 passes through base 2 and outside circuit connection. There is a mounting groove on the front side of the base 2 located at the front end of the contact point 33, the size of which is just enough to place the main body of the torsion spring in it, cooperate with the upper cover 1 to fix the torsion spring to the front end of the contact point 33 of the movable terminal 4 side of base 2.

As shown in Figure 8, the structure of the torsion spring is similar to that of Embodiment 2. The action arm of the torsion spring is extended from the torsion spring to the direction of the fixed terminal 3 to form the eighth action support arm 431, which is bent on the upper part of the protrusion 51 to form a parallel The ninth action support arm 432 on the bottom surface of the base 2 is located on the upper part of the protrusion 51. When the pressing member 5 moves up and down, the protrusion can push the ninth action support arm to move up and down, and finally bend and extend The tenth action arm 433 opposite to the static contact is formed at the upper end of the contact, and the torsion spring also includes a pin end 430, which passes through the outside of the base 2 from one end of the torsion spring and is connected to an external circuit.

As shown in Figure 9, on the edge of the lower part of the pressing part 5 opposite to the position of the ninth action support arm, a protrusion 51 is provided. The upper part of the protrusion 51 contacts, and because of the elastic action of the return spring 6, the ninth action support arm is pushed away by the upper part of the protrusion 51, the action arm of the movable terminal 4 is separated from the contact of the fixed terminal 3, the connection is disconnected, and no signal is generated ; When the pressing part 5 is pressed artificially, the elasticity of the action arm is close to the upper part of the pressing part 5 protrusion 51 and moves down with the pressing part 5 being pressed, and the end of the action arm contacts with the contact point of the fixed terminal 3, and the connection When connected, a key signal is generated.

Fig. 10 is a schematic structural diagram of an assembled state of the embodiment 1-2 of the switch using torsion springs as terminals according to the present invention.

As shown in FIG. 10 , the upper cover 1 and the base 2 are fastened to form a whole, and the pressing member 5 protrudes from the upper cover 1 . As can be seen from the figure below, the pin ends of the fixed terminal 3 and the movable terminal 4 are exposed outside the base 2, and the pin ends are respectively connected to external circuits, and also include a fixed bezel 7, which exposes both ends for fixing on the keyboard. The base 2 also includes two mounting posts for positioning switches of terminals using torsion springs.

In Embodiment 2 and Embodiment 3, the action arm of the torsion spring is disconnected from the contact end of the fixed terminal by the lifting action of the protrusion of the pressing part, and the reset direction of the action arm of the torsion spring is to contact the contact end of the fixed terminal. Contact, this design can ensure good contact between the fixed terminal and the movable terminal when the switch is pressed, and at the same time, the downward stroke of the pressing member is not limited by the resistance of the two terminals after contact, which provides convenience for increasing the pressing stroke and hand feeling.

It should be noted that the direction of the torsion spring action arm can be adjusted according to the actual situation. The shapes of the torsion spring action arms provided in Examples 1-3 are all optimal shapes. Any direction or shape change applied to the torsion spring action arm All belong to the protection scope of the present utility model.

The above-mentioned embodiment is only a preferred implementation of the utility model, and its description is more specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present utility model, and these obvious replacement forms all belong to the protection scope of the present utility model.

Claims (10)

1. A switch using a torsion spring as a terminal, including an upper cover (1), a base (2), a fixed terminal (3), a movable terminal (4) and a pressing piece (5), and the base (2) is set There is a guide post (21), the pressing piece (5) is connected and installed on the guide post (21) sleeved with a return spring, the upper end exposes the upper cover (1) for pressing, and the upper cover (1) is fastened with the base (2) A cavity is formed in the middle, and the fixed terminal (3) and the movable terminal (4) are arranged in the cavity, and one end of the fixed terminal (3) and the movable terminal (4) pass through the base (2) to connect with an external circuit; Pushing the movable terminal (4) to move by moving up and down the pressing part (5) to control the contact and disconnection between the movable terminal (4) and the fixed terminal (3), characterized in that: the movable terminal (4) is The torsion spring (4), which is installed on the base, is located on one side of the fixed terminal (3); one end of the torsion spring (4) passes through the base for line connection, and the end is fixed to the base, and the other end of the torsion spring (4) is used as an action arm Controlled by the pressing piece (5) to contact with the fixed terminal (3). 2. The switch using a torsion spring as a terminal according to claim 1, characterized in that: the pressing piece (5) extends at least one protrusion (51) toward the movable terminal (4), and the pressing piece (5) ) moves up and down through the protrusion to push the action arm to move to achieve contact with or disconnect from the fixed terminal (3). 3. The switch using a torsion spring as a terminal according to claim 1, characterized in that: the fixed terminal (3) includes a contact end (33), and the contact end (33) is perpendicular to the base (2) For setting, the pressing piece (5) controls the action arm to move back and forth so that the action arm and the contact point (33) are disconnected or contacted. 4. The switch using a torsion spring as a terminal according to claim 3, characterized in that: the fixed terminal (3) also includes a mounting part (32), and the mounting part (32) is provided with a through hole, the fixed terminal (3) Connect to the guide post (21) through the through hole to achieve fixation. One end of the mounting part is bent and passed through the outside of the base (2) for external line connection, and the other end is bent and extended upwards to form a contact end (33) . 5. The switch using a torsion spring as a terminal according to claim 3, characterized in that: the base (2) is provided with a torsion spring fixing column perpendicular to the bottom surface of the base (2) to facilitate the rotation of the torsion spring action arm (23), the torsion spring (4) is sleeved on the torsion spring fixing column (23). 6. The switch using a torsion spring as a terminal according to claim 5, characterized in that: the action arm of the torsion spring (4) is at the level where the upper end of the torsion spring (4) is higher than the level of the contact end (33) The first action support arm (411) extends parallel to the bottom surface of the base (2), and is bent vertically downward at the protrusion (51) of the corresponding pressing piece (5), extending below the level of the contact end (33) Form the second action support arm (412), then bend vertically and extend to the directly lower part of the contact end (33) to form the third action support arm (413), and then bend upward so that the end extends to the front end of the contact end (33) A fourth arm (414) opposite to the fixed terminal (3) is formed to form an unclosed square structure. 7. The switch using a torsion spring as a terminal according to claim 1, characterized in that: the fixed terminal (3) includes a contact end (33), and the contact end (33) is parallel to the base (2) For setting, the pressing member (5) controls the action arm to move up and down so that the contact of the action arm is disconnected or contacted with the contact end (33). 8. The switch using a torsion spring as a terminal according to claim 7, characterized in that: the fixed terminal (3) also includes a mounting part (32), and the mounting part (32) is provided with a through hole, the fixed terminal (3) It is fixed to the guide post (21) through the through hole, and one end of the installation part is bent and passed through the outside of the base (2) for external circuit connection, and the other end is extended in parallel to form a contact end (33). 9. The switch using a torsion spring as a terminal according to claim 7, characterized in that: the base (2) is provided with a mounting groove (24), and the torsion spring (4) is laterally fixed in the mounting groove (24) )Inside. 10. The switch using a torsion spring as a terminal according to claim 9, characterized in that: the action arm of the torsion spring (4) is formed by extending one end of the torsion spring (4) toward the fixed terminal (3) The fifth action arm (421), on the upper part of the corresponding protrusion (51), bends the sixth action arm (422) that is approximately parallel to the bottom surface of the base (2) for the protrusion (51) to lift, and finally bends and extends The seventh action support arm (423) is formed above the fixed terminal in contact with the contact end of the fixed terminal; the sixth action support arm (422) moves up and down due to whether it is pulled by the protrusion (51) to realize the connection with the fixed terminal. The opening and contacting of the terminal contact end.