Trigger switch push rod and return spring arrangement

Abstract

The utility model discloses a kind of push rod and reset spring structure of trigger switch, the push rod and reset spring structure of this trigger switch include reset spring installed between shell and push rod, the upper end of this reset spring is embedded in the spring groove set in the lower end of push rod, the shell is provided with cylindrical groove, and the inboard of this cylindrical groove is provided with several sliding grooves;The push rod is provided with several downwardly extending slides at the lower end of spring groove periphery, the slide is distributed and surrounds the periphery of reset spring, and the slide is embedded in sliding groove and can slide up and down, the lower end of spring groove is embedded in cylindrical groove, so that spring groove is surrounded by cylindrical groove, spring groove and slide as a whole, in this way, spring can be better controlled, avoid spring in compression process in compression process will be bent and produce compression feel bad, to improve the feel of pressing push rod, simultaneously, it can also ensure that spring is stably installed between shell and push rod, improve product quality.

Description

Technical fields:

[0001] This utility model relates to the field of switch technology, and specifically to a push rod and reset spring structure for a trigger switch. Background technology:

[0002] Utility model patent application number 202122695972.5 discloses a high-voltage, high-current DC trigger switch with an arc-extinguishing structure, which includes a base, a top cover, a push shaft, and a return spring. One end of the push shaft extends out of the box formed by the base and the top cover, and the other end is located inside the box. A trigger is provided at the end of the push shaft extending out of the box. A moving contact arm, a moving contact arm bracket, a moving contact arm spring, and a stationary contact are provided on one side of the push shaft. The moving contact arm bracket and the stationary contact are both provided on the base. The moving contact arm is provided on the moving contact arm bracket, and one end of the moving contact arm is connected to the push shaft. An insulating block is provided at the position on the moving contact arm bracket where it connects to the moving contact arm spring. A moving contact is provided on the moving contact arm, and a stationary contact is provided on the stationary contact.

[0003] One end of the return spring is disposed in the through hole of the push shaft, and the other end of the return spring is disposed on the positioning post. The positioning post is disposed in the housing, thereby allowing the return spring to be installed between the push shaft and the housing, providing elastic force to the push shaft.

[0004] However, the aforementioned positioning pins are installed in the housing by a snap-fit ​​mechanism, which carries the risk of detachment or displacement. This results in an unstable installation of the return spring. Additionally, in the initial state (i.e., the uncompressed state), the lower end of the push shaft forms a large distance with the positioning pin. The portion of the return spring corresponding to this distance is not limited, which causes the return spring to bend during compression, resulting in a poor compression feel and affecting the feel of pressing the push shaft.

[0005] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a push rod and reset spring structure for a trigger switch.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the push rod and reset spring structure of the trigger switch includes a reset spring installed between the housing and the push rod. The upper end of the reset spring is embedded in a spring groove provided at the lower end of the push rod. A cylindrical groove is provided inside the housing, and a plurality of sliding grooves are provided on the inner side of the cylindrical groove. A plurality of downwardly extending slide bars are provided on the periphery of the lower end of the push rod. The slide bars are distributed and surround the periphery of the reset spring, and the slide bars are embedded in the sliding grooves and can slide up and down. The lower end of the spring groove is embedded in the cylindrical groove, so that the spring groove is completely surrounded by the cylindrical groove, the spring groove and the slide bars.

[0008] Furthermore, in the above technical solution, there are four sliding grooves arranged in a cross shape, and correspondingly, there are also four sliding bars arranged in a cross shape.

[0009] Furthermore, in the above technical solution, the inner surface of the slider that is close to or in contact with the reset spring is set as an arc-shaped surface.

[0010] Furthermore, in the above technical solution, the outer shell includes a left shell and a right shell fixed together. The lower part of the left shell is provided with a first arc-shaped groove, and the lower part of the right shell is provided with a second arc-shaped groove. The second arc-shaped groove and the first arc-shaped groove are connected to form the cylindrical groove.

[0011] Furthermore, in the above technical solution, the upper end of the cylindrical groove is also provided with an installation cylindrical groove, the size of which is larger than that of the cylindrical groove, and an inclined guide step is formed between the installation cylindrical groove and the cylindrical groove, and the sliding groove extends through the inner wall of the installation cylindrical groove.

[0012] Furthermore, in the above technical solution, the upper part of the left shell is provided with a third arc-shaped groove, and the upper part of the right shell is provided with a fourth arc-shaped groove. The third arc-shaped groove and the fourth arc-shaped groove are connected to form the mounting cylinder groove.

[0013] Furthermore, in the above technical solution, a mounting plate is formed on the outer side of one of the slide bars, and a set of conductive springs is provided on the side of the mounting plate for contacting and conducting with conductive sheets on the PCB board, which is installed inside the housing.

[0014] Furthermore, in the above technical solution, a trigger is also provided at the upper end of the push rod; a retractable and foldable flexible protective sleeve is also provided on the outside of the push rod, the lower end of the flexible protective sleeve is fixedly connected to the upper end of the outer shell, and the upper end of the flexible protective sleeve is fixedly connected to the lower end of the trigger.

[0015] Furthermore, in the above technical solution, the lower end of the trigger is provided with a limiting groove, the upper end of the push rod is provided with a limiting step that protrudes outward and is adapted to the limiting groove, and the upper end of the flexible protective sleeve is formed with a first stop edge extending from the outside to the inside, the first stop edge being squeezed and positioned between the limiting groove and the limiting step.

[0016] Furthermore, in the above technical solution, the upper end of the outer shell is formed with a convex ring body, and the outer periphery of the upper end of the convex ring body is provided with an annular groove; the lower end of the flexible protective sleeve is formed with a second flange extending from the outside to the inside, and the second flange is inserted into the annular groove from the outside to the inside.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention provides a cylindrical groove inside the outer shell, and a plurality of sliding grooves are provided on the inner side of the cylindrical groove; the push rod is provided with a plurality of downwardly extending slide bars on the lower periphery of the spring groove, the slide bars are distributed and surround the outer periphery of the spring, and the slide bars are embedded in the sliding grooves and can slide up and down. The lower end of the spring groove is embedded in the cylindrical groove, so that the spring groove is completely surrounded by the cylindrical groove, the spring groove and the slide bars, which can better control the spring and avoid the spring bending during the compression process, resulting in poor compression feel, thereby improving the feel of pressing the push rod. At the same time, it can also ensure that the spring is stably installed between the outer shell and the push rod, improving product quality. The addition of slide bars and sliding grooves makes the push rod slide more smoothly and more stably inside the outer shell. Attached image description:

[0018] Figure 1 This is a perspective view of the reversing switch including the present invention;

[0019] Figure 2 This is an exploded perspective view of the reversing switch that includes this utility model.

[0020] Figure 3 This is a cross-sectional view of the reversing switch that includes this utility model;

[0021] Figure 4 This is a perspective view of the forward / reverse switching gear structure in the reversing switch of this utility model;

[0022] Figure 5 This is a perspective view of the PCB board in the reversing switch of this utility model;

[0023] Figure 6 This is a perspective view of the push rod in the reversing switch of this utility model;

[0024] Figure 7 This is a first state diagram of the forward / reverse switching gear structure in the reversing switch of this utility model;

[0025] Figure 8 This is a second state diagram of the forward / reverse switching gear structure in the reversing switch of this utility model;

[0026] Figure 9 This is a third state diagram of the forward / reverse switching gear structure in the reversing switch of this utility model;

[0027] Figure 10 This is a perspective view including the right shell of this utility model;

[0028] Figure 11 It is a perspective view containing this utility model;

[0029] Figure 12 This is a cross-sectional view of the reversing switch of this utility model from another perspective;

[0030] Figure 13 This is a cross-sectional view from a third perspective of the reversing switch of this utility model. Detailed implementation method:

[0031] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0032] See Figure 1-13 As shown, a reversing switch includes a housing 1, a slidable push rod 2 disposed within the housing 1, a PCB board 3 mounted within the housing 1, a return spring 4 disposed between the lower end of the push rod 2 and the bottom wall of the housing 1, a trigger 5 mounted on the upper end of the push rod 2, and a forward / reverse switching mechanism 6 mounted within the housing 1 and connected to the PCB board 3. The push rod 2 has a conductive spring assembly 21 on its side for contacting and conducting with a conductive sheet 32 ​​disposed on the PCB board 3. When the trigger 5 is pressed, the push rod 2 compresses the return spring 4, causing it to slide inward relative to the housing 1 and the PCB board 3. The conductive spring assembly 21 then contacts the conductive sheet 32, achieving conductivity and enabling the reversing switch to operate.

[0033] The trigger switch push rod and reset spring structure of this utility model includes a reset spring 4 installed between the housing 1 and the push rod 2, the upper end of which is embedded in the spring groove 24 provided at the lower end of the push rod 2.

[0034] To improve the stability of the reset spring 4 during installation and to better control it, preventing it from bending during compression and resulting in a poor compression feel, the following improvements were made: A cylindrical groove 12 is provided inside the outer casing 1, and several sliding grooves 121 are provided on the inner side of the cylindrical groove 12; several downwardly extending slide bars 25 are provided on the lower periphery of the spring groove 24 of the push rod 2. These slide bars 25 surround the periphery of the reset spring 4 and are embedded in the sliding grooves 121, allowing them to slide up and down. The lower end of the spring groove 24 is embedded in the cylindrical groove 12, so that the entire spring groove 24 is surrounded by the cylindrical groove 12, the spring groove 24, and the slide bars 25. This better controls the reset spring 4, preventing it from bending during compression and resulting in a poor compression feel, thereby improving the feel of pressing the push rod 2. Simultaneously, it ensures that the reset spring 4 is stably installed between the outer casing 1 and the push rod 2, improving product quality. The addition of the slider 25 and the sliding groove 121 allows the push rod 2 to slide more smoothly and stably within the housing.

[0035] The sliding grooves 121 are four in number and arranged in a cross shape. Correspondingly, there are also four sliding bars 25 arranged in a cross shape. This design is simple in structure and effectively encloses the return spring 4, while allowing the push rod 2 to slide more smoothly and stably within the housing. Of course, the number of sliding grooves 121 and sliding bars 25 can also be three, five, or even more, depending on the actual usage requirements.

[0036] The inner surface of the slider 25 that is close to or in contact with the return spring 4 is set as an arc-shaped surface, which can better wrap around the return spring 4 and prevent the return spring 4 from bending during compression.

[0037] The outer shell 1 includes a left shell 13 and a right shell 14 fixed together. The lower part of the left shell 13 is provided with a first arc-shaped groove 131, and the lower part of the right shell 14 is provided with a second arc-shaped groove 141. The second arc-shaped groove 141 and the first arc-shaped groove 131 are connected to form the cylindrical groove 12, which has an extremely simple structure.

[0038] The upper end of the cylindrical groove 12 is also provided with a mounting groove 15, the size of which is larger than that of the cylindrical groove 12. An inclined guide step 16 is formed between the mounting groove 15 and the cylindrical groove 12, and the sliding groove 121 extends through the inner wall of the mounting groove 15. The mounting groove 15 is provided to facilitate the installation of the return spring 4. The upper part of the left housing 13 is provided with a third arc-shaped groove 132, and the upper part of the right housing 14 is provided with a fourth arc-shaped groove 142. The third arc-shaped groove 132 and the fourth arc-shaped groove 142 are joined to form the mounting groove 15.

[0039] One of the slide bars 25 has a mounting plate 26 formed on its outer side. The mounting plate 26 has a set of conductive springs 21 on its side for contacting and conducting with the conductive sheet 32 ​​on the PCB board 3. The PCB board 3 is installed inside the housing 1.

[0040] The PCB board 3 is also connected to a ribbon cable 30, the end of which extends out of the housing 1 and is provided with a connector 301. The ribbon cable 30 is also connected to an indicator light 302.

[0041] The forward / reverse shifting gear structure 6 consists of a reversing lever 61 and a shifting contact spring 62. The reversing lever 61 is mounted inside the housing 1 in a swingable manner. One end of the reversing lever 61 is provided with a toggle part 611, which is exposed outside the housing 1. The other end of the reversing lever 61 is provided with a shifting part 612. The shifting contact spring 62 is provided on the side of the shifting part 612 and contacts the gear position conductive plate 31 provided on the PCB board 3 installed inside the housing 1. In operation, this invention drives the shifting part 612 at the other end of the reversing lever 61 to swing after the actuating part 611 of the reversing lever 61 is moved. Simultaneously, the shifting part 612 swings, causing the shifting contact spring 62 to swing, thus driving the shifting contact spring 62 to contact the different gear conductive plates 31 on the PCB board 3, thereby achieving forward / reverse gear switching. The forward / reverse gear switching structure 6 does not require a reversing slider, reducing the action of converting swinging to sliding, and achieving more stable forward / reverse gear switching. In other words, the forward / reverse gear switching structure 6 consists of only two parts: the reversing lever 61 and the shifting contact spring 62. It has fewer parts, a relatively simple structure, and can achieve stable forward / reverse gear switching, making it extremely convenient to use.

[0042] In this embodiment, there are three gear position conductive plates 31, which are arranged in an arc shape. The shift contact spring 62 contacts two adjacent gear position conductive plates 31 to realize forward and reverse gear switching.

[0043] Specifically, when the shift contact spring 62 contacts the middle shift conductive plate 31 and the right shift conductive plate 31, it is in the forward gear position; when the shift contact spring 62 contacts the middle shift conductive plate 31 and the left shift conductive plate 31, it is in the reverse gear position; the size of the middle shift conductive plate 31 is greater than or equal to the size of the shift contact spring 62, so that when the shift contact spring 62 only contacts the middle shift conductive plate 31, it is in the anti-accidental contact position, which is the initial state or the normal state.

[0044] To ensure that the shift contact spring 62 is more stably in the forward, reverse, or anti-accidental engagement position, the following design was also implemented:

[0045] One end of the reversing lever 61 is provided with a toggle part 611, and the other side is provided with a reversing insert block 613; the trigger 5 is provided with a left groove 51 and a right groove 52 for the reversing insert block 613 to be inserted into, and a retaining wall 53 located between the left groove 51 and the right groove 52. The reversing insert block 613 is also provided with a middle groove 603 for the retaining wall 53 to be inserted into.

[0046] In other words, by moving the actuating part 611 of the reversing lever 61, the shifting part 612 at the other end of the reversing lever 61 is driven to swing. While swinging, the shifting part 612 drives the shifting contact spring 62 to swing. When the shifting contact spring 62 is only in contact with the middle gear conductive plate 31, it is in the anti-accidental contact gear position. At this time, the reversing clamp block 613 is located below the barrier wall 53 of the trigger 5. When the trigger 5 is pressed, the barrier wall 53 is embedded in the middle groove 603 of the reversing clamp block 613, which prevents the trigger 5 from being pressed again, thus achieving the function of preventing accidental contact.

[0047] By actuating the actuating part 611 of the reversing lever 61, the shifting part 612 at the other end of the reversing lever 61 is driven to swing. Simultaneously, the shifting part 612 swings, causing the shifting contact spring 62 to swing. When the shifting contact spring 62 contacts the middle and right-side shifting conductive plates 31, it is in the forward rotation position. At this time, the actuating part 611 is located below the left slot 51 of the trigger 5. Pressing the trigger 5 causes the push rod 2 to compress the return spring 4, sliding it inward relative to the outer casing 1 and the PCB board 3. The conductive spring group 21 contacts the conductive plate 32 to achieve conductivity, thus enabling the reversing switch to operate. Furthermore, the left slot 51 of the trigger 5 is fitted around the reversing clamp block 613 of the reversing lever 61, ensuring that the forward rotation position is in the triggered conductive state. Figure 7 As shown.

[0048] By actuating the actuating part 611 of the reversing lever 61, the shifting part 612 at the other end of the reversing lever 61 is driven to swing. Simultaneously, the shifting part 612 swings, causing the shifting contact spring 62 to swing. When the shifting contact spring 62 contacts the middle shifting conductive plate 31 and the left shifting conductive plate 31, it is in the forward rotation position. At this time, the actuating part 611 is located below the right slot 52 of the trigger 5. Pressing the trigger 5 causes the push rod 2 to compress the return spring 4, sliding inward relative to the outer casing 1 and the PCB board 3. The conductive spring group 21 contacts the conductive plate 32 to achieve conductivity, thus enabling the reversing switch to operate. Furthermore, the right slot 52 of the trigger 5 is fitted around the reversing clamp block 613 of the reversing lever 61, ensuring that the reverse rotation position is in the triggered conductive state. Figure 8-9 As shown.

[0049] The shifting part 612 is provided with a mounting groove 601, and a positioning post 602 is provided in the mounting groove 601. The shifting contact spring 62 includes a main body 621 and a first contact spring arm 622 and a second contact spring arm 623 integrally bent at both ends of the main body 621. The main body 621 is provided with a positioning hole 604. The main body 621 is embedded and positioned in the mounting groove 601, and the positioning hole 604 is sleeved and fixed to the outside of the positioning post 602 to ensure the stability of the assembly structure. This allows the shifting contact spring 62 to be stably installed in the mounting groove 601 of the shifting part 612. The ends of the first contact spring arm 622 and the second contact spring arm 623 both protrude out of the mounting groove 601 so as to contact the shifting conductive sheet 31 provided on the PCB board 3.

[0050] The positioning post 602 has a shape that is large at the base and small at the end. The end of the positioning post 602 also has a riveting edge that protrudes outward (not shown in the figure). The riveting edge abuts against the outside of the positioning hole 604 to prevent the main body 621 from disengaging from the positioning post 602, thereby ensuring the stability of the assembly structure and improving product quality.

[0051] The push rod 2 is also covered with a retractable and foldable flexible protective sleeve 22. The lower end of the flexible protective sleeve 22 is fixedly connected to the upper end of the outer shell 1, and the upper end of the flexible protective sleeve 22 is fixedly connected to the lower end of the trigger 5. The flexible protective sleeve 22 plays a good protective role and also has a good waterproof and dustproof effect.

[0052] The specific assembly structure of the flexible protective sleeve 22 is as follows: the lower end of the trigger 5 is provided with a limiting groove 54, the upper end of the push rod 2 is provided with a limiting step 23 that protrudes outward and matches the limiting groove 54, and the upper end of the flexible protective sleeve 22 is formed with a first flange 221 extending from the outside to the inside, which is pressed and positioned between the limiting groove 54 and the limiting step 23. The upper end of the outer shell 1 is formed with a convex ring 11, and the outer periphery of the upper end of the convex ring 11 is provided with an annular groove 111; the lower end of the flexible protective sleeve 22 is formed with a second flange 222 extending from the outside to the inside, which is inserted into the annular groove 111 from the outside to the inside, so that the flexible protective sleeve 22 is stably connected between the trigger 5 and the outer shell 1.

[0053] In summary, this utility model provides a cylindrical groove 12 inside the outer shell 1, and a plurality of sliding grooves 121 are provided on the inner side of the cylindrical groove 12; the push rod 2 is provided with a plurality of downwardly extending slide bars 25 on the lower periphery of the spring groove 24, the slide bars 25 are distributed and surround the periphery of the return spring 4, and the slide bars 25 are embedded in the sliding grooves 121 and can slide up and down. The lower end of the spring groove 24 is embedded in the cylindrical groove 12, so that the spring groove 24 is completely surrounded by the cylindrical groove 12, the spring groove 24 and the slide bars 25. This can better control the return spring 4, avoid the return spring 4 from bending during the compression process and causing poor compression feel, thereby improving the feel of pressing the push rod 2. At the same time, it can also ensure that the return spring 4 is stably installed between the outer shell 1 and the push rod 2, improving product quality.

[0054] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A push rod and return spring structure for a trigger switch, comprising a return spring (4) installed between a housing (1) and a push rod (2), wherein the upper end of the return spring (4) is embedded in a spring groove (24) provided at the lower end of the push rod (2), characterized in that: The outer casing (1) is provided with a cylindrical groove (12), and the inner side of the cylindrical groove (12) is provided with a plurality of sliding grooves (121); the push rod (2) is provided with a plurality of downwardly extending slide bars (25) on the outer periphery of the lower end of the spring groove (24). The slide bars (25) are distributed and surround the periphery of the reset spring (4), and the slide bars (25) are embedded in the sliding grooves (121) and can slide up and down. The lower end of the spring groove (24) is embedded in the cylindrical groove (12), so that the spring groove (24) is surrounded by the cylindrical groove (12), the spring groove (24) and the slide bars (25).

2. The push rod and return spring structure of a trigger switch according to claim 1, characterized in that: There are four sliding grooves (121) arranged in a cross shape, and correspondingly, there are also four sliding bars (25) arranged in a cross shape.

3. The push rod and return spring structure of a trigger switch according to claim 1, characterized in that: The inner surface of the slider (25) that is close to or in contact with the return spring (4) is set as an arc-shaped surface.

4. The push rod and return spring structure of a trigger switch according to any one of claims 1-3, characterized in that: The outer shell (1) includes a left shell (13) and a right shell (14) fixed together. The lower part of the left shell (13) is provided with a first arc-shaped groove (131), and the lower part of the right shell (14) is provided with a second arc-shaped groove (141). The second arc-shaped groove (141) and the first arc-shaped groove (131) are connected to form the cylindrical groove (12).

5. The push rod and return spring structure of a trigger switch according to claim 4, characterized in that: The upper end of the cylindrical groove (12) is also provided with an installation cylindrical groove (15), the size of which is larger than that of the cylindrical groove (12). An inclined guide step (16) is formed between the installation cylindrical groove (15) and the cylindrical groove (12), and the sliding groove (121) extends through the inner wall of the installation cylindrical groove (15).

6. The push rod and return spring structure of a trigger switch according to claim 5, characterized in that: The upper part of the left shell (13) is provided with a third arc-shaped groove (132), and the upper part of the right shell (14) is provided with a fourth arc-shaped groove (142). The third arc-shaped groove (132) and the fourth arc-shaped groove (142) are connected to form the mounting cylinder groove (15).

7. The push rod and return spring structure of a trigger switch according to claim 4 or 5, characterized in that: One of the slide bars (25) has a mounting plate (26) formed on its outer side. The mounting plate has a set of conductive springs (21) on its side for contacting and conducting with the conductive sheet (32) on the PCB board (3). The PCB board (3) is installed inside the housing (1).

8. The push rod and return spring structure of a trigger switch according to claim 4 or 5, characterized in that: The upper end of the push rod (2) is also provided with a trigger (5); the push rod (2) is also covered with a retractable and foldable flexible protective sleeve (22), the lower end of which is fixedly connected to the upper end of the outer shell (1), and the upper end of which is fixedly connected to the lower end of the trigger (5).

9. The push rod and return spring structure of a trigger switch according to claim 8, characterized in that: The trigger (5) has a limiting groove (54) at its lower end, and the push rod (2) has a limiting step (23) that protrudes outward and matches the limiting groove (54) at its upper end. The flexible protective sleeve (22) has a first flange (221) that extends from the outside to the inside at its upper end. The first flange (221) is squeezed and positioned between the limiting groove (54) and the limiting step (23).

10. The push rod and return spring structure of a trigger switch according to claim 9, characterized in that: The upper end of the outer shell (1) is formed with a convex ring (11), and the outer periphery of the upper end of the convex ring (11) is provided with an annular groove (111); the lower end of the flexible protective sleeve (22) is formed with a second flange (222) extending from the outside to the inside, and the second flange (222) is inserted into the annular groove (111) from the outside to the inside.

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