A positive and negative conversion gear structure of a trigger switch

Abstract

This utility model discloses a forward / reverse switching structure for a trigger switch, which consists of a reversing lever and a shift contact spring. The reversing lever is mounted in a swingable manner within a housing, with one end having a toggle part exposed outside the housing; the other end of the reversing lever has a shifting part, and the shift contact spring is disposed on the side of the shifting part, contacting a shift conductive plate mounted on a PCB board inside the housing. This forward / reverse switching structure consists of only two parts: a reversing lever and a shift contact spring. It has few parts, a relatively simple structure, and can achieve stable forward / reverse switching, making it extremely convenient to use.

Description

Technical fields:

[0001] This utility model relates to the field of switch technology, and specifically to a forward / reverse switching structure for a trigger switch. Background technology:

[0002] The utility model patent with 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] A reversing slider is provided above the push shaft, and a reversing lever that cooperates with the reversing slider is provided above the reversing slider. A fixing groove is provided on the base body corresponding to the position of the reversing slider. A positioning spring is provided in the fixing groove. The positioning spring is provided with a recess. A reversing boss is provided at one end of the reversing lever. The reversing boss can jump within the recess. A reversing block is provided at the other end of the reversing lever. A positioning rib is provided inside the trigger. The reversing block can abut against the positioning rib. A reversing locking post is provided at the bottom of the reversing lever. A reversing oblique strip hole is provided at the top of the reversing slider. When the reversing lever is turned, the reversing locking post can slide within the reversing oblique strip hole. A reversing slider groove is provided on the side of the reversing slider near the circuit board assembly. A reversing spring is provided in the reversing slider groove. The reversing spring can slide on the circuit board assembly.

[0004] The aforementioned reversing slider, reversing lever, and reversing spring form a forward / reverse switching gear structure. After the reversing lever is rotated or swung, the reversing locking pin of the reversing lever slides in the reversing oblique strip hole of the reversing slider to drive the reversing slider to move linearly, thereby driving the reversing spring of the reversing slider to slide on the circuit board assembly, thus realizing the gear switching function.

[0005] However, the aforementioned forward / reverse switching gear structure has many parts and a relatively complex structure, requiring the use of a reversing slider, which makes assembly quite cumbersome. In view of this, the inventor has improved the forward / reverse switching gear structure to 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 forward / reverse switching structure for a trigger switch.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a forward / reverse switching gear structure of a trigger switch is composed of a reversing rod and a shift contact spring, wherein the reversing rod is installed in the housing in a swingable manner, one end of the reversing rod is provided with a toggle part, which is exposed outside the housing; the other end of the reversing rod is provided with a shift part, and the shift contact spring is provided on the side of the shift part, and the shift contact spring contacts a gear conductive plate provided on a PCB board installed in the housing.

[0008] Furthermore, in the above technical solution, there are three gear position conductive plates, which are arranged in an arc shape. The gear shift contact spring contacts two adjacent gear position conductive plates to achieve forward and reverse gear switching.

[0009] Furthermore, in the above technical solution, when the shift contact spring contacts the middle shift conductive plate and the right shift conductive plate, it is in the forward gear position; when the shift contact spring contacts the middle shift conductive plate and the left shift conductive plate, it is in the reverse gear position; the size of the middle shift conductive plate is greater than or equal to the size of the shift contact spring, so that when the shift contact spring contacts only the middle shift conductive plate, it is in the anti-accidental contact gear position.

[0010] Furthermore, in the above technical solution, the shifting part is provided with a mounting groove, and a positioning post is provided in the mounting groove; the shifting contact spring includes a main body and a first contact spring arm and a second contact spring arm integrally bent at both ends of the main body. The main body is provided with a positioning hole, and the main body is embedded and positioned in the mounting groove. The positioning hole is sleeved and fixed outside the positioning post, and the ends of the first contact spring arm and the second contact spring arm both protrude out of the mounting groove.

[0011] Furthermore, in the above technical solution, the positioning post has a shape that is large at the base and small at the end. The end of the positioning post also has a riveting edge that protrudes outward. The riveting edge abuts against the outside of the positioning hole to prevent the main body from disengaging from the positioning post.

[0012] Furthermore, in the above technical solution, a slidable push rod is also provided inside the housing. A spring is also provided between the lower end of the push rod and the bottom wall of the housing. A trigger is also provided at the upper end of the push rod. A set of conductive springs is provided on the side of the push rod for contacting and conducting with conductive sheets on the PCB board.

[0013] Furthermore, in the above technical solution, a reversing insert block is provided on the other side of the reversing lever opposite to the toggle part; the trigger is provided with a left groove and a right groove for the reversing insert block to be inserted into, and a retaining wall located between the left groove and the right groove, and a middle groove for the retaining wall to be inserted into the middle of the reversing insert block.

[0014] Furthermore, in the above technical solution, the push rod is also covered with a retractable and foldable flexible protective sleeve. 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: When the present invention is working, by moving the moving part of the reversing lever, the shifting part at the other end of the reversing lever is driven to swing. While the shifting part swings, it drives the shifting contact spring to swing, so as to drive the shifting contact spring to contact the conductive plates of different gears on the PCB board, so as to realize the forward and reverse gear switching. The forward and reverse gear switching structure of the present invention consists of only two parts: the reversing lever and the shifting contact spring. It has few parts, a relatively simple structure, and can realize stable forward and reverse gear switching, making it extremely convenient to use. Attached image description:

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

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

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

[0021] Figure 4 This is a perspective view of the present invention;

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

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

[0024] Figure 7 This is a first state diagram of the present invention;

[0025] Figure 8 This is the second state diagram of this utility model;

[0026] Figure 9 This is the third state diagram of this utility model. Detailed implementation method:

[0027] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0028] See Figure 1-9 The diagram shows a trigger switch comprising a housing 1, a slidable push rod 2 disposed within the housing 1, a PCB board 3 mounted within the housing 1, a 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 structure 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 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 thus enabling the trigger switch to operate.

[0029] 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.

[0030] The forward / reverse shifting gear structure 6 of this utility model consists of a reversing lever 61 and a shifting contact spring 62. The reversing lever 61 is installed in 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 in 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 drives the shifting contact spring 62 to swing, causing the shifting contact spring 62 to contact the different gear conductive plates 31 on the PCB board 3, thus achieving forward / reverse gear switching. This invention eliminates the need for a reversing slider as described in the prior art, reducing the swing-to-slide motion and enabling more stable forward / reverse gear switching. In other words, the forward / reverse gear switching structure 6 of this invention consists of only two parts: the reversing lever 61 and the shifting contact spring 62. With fewer parts and a relatively simple structure, it achieves stable forward / reverse gear switching and is extremely convenient to use.

[0031] 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.

[0032] 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.

[0033] 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:

[0034] 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.

[0035] 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.

[0036] 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 spring 4, sliding inward relative to the outer casing 1 and the PCB board 3. The conductive spring assembly 21 contacts the conductive plate 32 to achieve conductivity, thus enabling the trigger switch to operate. Furthermore, the left slot 51 of the trigger 5 is fitted around the reversing insert block 613 of the reversing lever 61, ensuring that the forward rotation position is in the triggered conductive state. Figure 7 As shown.

[0037] 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 spring 4, sliding inward relative to the outer casing 1 and the PCB board 3. The conductive spring assembly 21 contacts the conductive plate 32 to achieve conductivity, thus enabling the trigger 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, thereby ensuring that the reverse rotation position is in the triggered conductive state. Figure 8-9 As shown.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In summary, when this utility model is in operation, 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 the shifting part 612 swings, it drives the shifting contact spring 62 to swing, so as to drive the shifting contact spring 62 to contact the different gear conductive plates 31 on the PCB board 3, so as to realize the forward and reverse gear switching. The forward and reverse gear switching structure 6 of this utility model consists of only two parts: the reversing lever 61 and the shifting contact spring 62. It has few parts, a relatively simple structure, and can realize stable forward and reverse gear switching, making it extremely convenient to use.

[0043] 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 forward / reverse switching mechanism for a trigger switch, characterized in that: The forward / reverse shifting gear structure (6) consists of a reversing lever (61) and a shifting contact spring (62). The reversing lever (61) is installed 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 shifting contact spring (62) with the gear position conductive plate (31) provided on the PCB board (3) installed inside the housing (1).

2. The forward / reverse switching structure of a trigger switch according to claim 1, characterized in that: The number of gear position conductive plates (31) is three, which are arranged in an arc shape. The shift contact spring (62) contacts the two adjacent gear position conductive plates (31) to realize the forward and reverse gear switching.

3. The forward / reverse switching structure of a trigger switch according to claim 2, characterized in that: 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) contacts only the middle shift conductive plate (31), it is in the anti-accidental contact gear position.

4. The forward / reverse switching structure of a trigger switch according to claim 1, characterized in that: 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 outside the positioning post (602). The ends of the first contact spring arm (622) and the second contact spring arm (623) both protrude out of the mounting groove (601).

5. The forward / reverse switching structure of a trigger switch according to claim 4, characterized in that: 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. 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).

6. A forward / reverse switching structure for a trigger switch according to any one of claims 1-5, characterized in that: The outer casing (1) is also provided with a sliding push rod (2), and a spring (4) is provided between the lower end of the push rod (2) and the bottom wall of the outer casing (1). A trigger (5) is also provided at the upper end of the push rod (2). A conductive spring group (21) is provided on the side of the push rod (2) for contacting and conducting with the conductive sheet (32) provided on the PCB board (3).

7. The forward / reverse switching structure of a trigger switch according to claim 6, characterized in that: 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.

8. The forward / reverse switching structure of a trigger switch according to claim 6, characterized in that: 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).

9. The forward / reverse switching 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 forward / reverse switching 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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