Ejector pin structure for automobile combination switch trigger

Abstract

The present invention discloses a push pin structure for a combination switch trigger in an automobile. The trigger of this structure has a rectangular cavity and a circular cavity connected along the axial direction. The four walls of the rectangular cavity are provided with grooves. The push pin body is hollow cylindrical with a spherical front end. The outer ring of the front section of the push pin body is provided with eight ribs. The outer ring of the middle section of the push pin body is symmetrically provided with first and second bosses. The outer ring of the end of the push pin body is provided with a ridge, and the inner ring is provided with an expanded arc. A spring is provided within the hollow cavity of the push pin body. The push pin body is provided within the cavity of the trigger. The ends of the eight ribs of the outer ring of the front section of the push pin body abut against the bottom corners of the grooves in the four walls of the rectangular cavity. The first and second bosses abut against the bottom edges of the grooves in the four walls of the rectangular cavity. The ridge of the outer ring of the end of the push pin body is located within the circular cavity and has a clearance fit. This structure reduces friction between the push pin and the rectangular cavity at the front end of the trigger, prevents the push pin from shaking within the rectangular cavity, improves assembly convenience, and enhances product quality.

Description

Technical Field

[0001] The invention relates to a push pin structure for a combination switch trigger of an automobile. Background Art

[0002] Typically, a combination switch located on a car's steering column controls various lights and signals by pushing and pulling a trigger and rotating a knob switch at the end of the trigger. When the car turns, the trigger is toggled to signal the turn, and the trigger automatically returns to its original position after the turn is completed. The trigger returns to its original position via a built-in ejector pin. Traditional ejector pins have a rectangular cross-section and are located in a rectangular cavity at the front end of the trigger. As the ejector pin slides within the rectangular cavity, the contact area between the ejector pin surface and the cavity wall increases, increasing friction and making the ejector pin susceptible to wear and failure, shortening its service life. Furthermore, the increased friction hinders the ejector pin's sliding within the rectangular cavity, causing the trigger to become stuck, severely impacting the proper application of the combination switch. Furthermore, due to assembly limitations, after the ejector pin is assembled into the rectangular cavity, a large gap exists between the ejector pin and the rectangular cavity, causing the ejector pin to wobble within the cavity. This significantly reduces the reliability and flexibility of the combination switch, impacting product quality. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a push pin structure for a combination switch trigger of an automobile. The structure overcomes the defects of traditional push pins, reduces the friction between the push pin and the rectangular cavity at the front end of the trigger, avoids the push pin from shaking in the rectangular cavity, improves the convenience of assembly, ensures the reliability and flexibility of combination switch operation, and improves product quality.

[0004] In order to solve the above technical problems, the present invention provides a pin ejector structure for a combination switch trigger of an automobile, comprising a trigger, a pin ejector body, and a spring. The trigger is provided with a cavity along the axial direction, the front section of the cavity being a rectangular cavity and the rear section being a circular cavity. The four walls of the rectangular cavity are provided with grooves, and adjacent grooves form mutually perpendicular right-angled sides. The pin ejector body is hollow cylindrical and has a spherical front end. The outer ring of the front section of the pin ejector body is provided with eight ribs spaced apart along the length direction. The outer ring of the middle section of the pin ejector body is symmetrically provided with a first boss in the vertical direction and a second boss in the horizontal direction. The end of the pin ejector body is provided with a spring. The outer ring is provided with a ridge along the circumferential direction, and the inner ring is provided with an expanded arc along the circumferential direction. The spring is provided in the hollow cavity of the ejector pin body. The ejector pin body and the spring are provided in the cavity of the trigger, and one end of the spring abuts against the inner wall of the spherical end of the ejector pin body, and the other end abuts against the bottom end of the trigger cavity. The ends of the eight ribs of the outer ring of the front section of the ejector pin body abut against the bottom corners of the grooves on the four walls of the rectangular cavity, respectively, and the first boss and the second boss abut against the bottom edges of the grooves on the four walls of the rectangular cavity, respectively. The ridge of the outer ring at the end of the ejector pin body is located in the circular cavity and is clearance-fitted.

[0005] Furthermore, the height of the first boss is greater than the height of the second boss, and the distance between the end surfaces of the two first bosses and the distance between the end surfaces of the two second bosses match the length and width of the rectangular cavity.

[0006] Furthermore, the ends of the eight ribs on the outer ring of the front section of the ejector body are rounded.

[0007] Furthermore, the roots of the eight ribs are provided with thinning grooves on the outer ring of the ejector pin body.

[0008] Since the ejector pin structure for the automobile combination switch trigger of the present invention adopts the above-mentioned technical solution, that is, the trigger of this structure is provided with a cavity along the axial direction, the front section of the cavity is a rectangular cavity, and the rear section is a circular cavity, the four walls of the rectangular cavity are provided with grooves, the ejector pin body is a hollow cylindrical body and the front end end is a spherical surface, the outer ring of the front section of the ejector pin body is respectively provided with eight ribs, the outer ring of the middle part of the ejector pin body is symmetrically provided with a first boss and a second boss, the outer ring of the end of the ejector pin body is provided with a ridge, and the inner ring is provided with an expanded arc, the spring is provided in the hollow cavity of the ejector pin body, the ejector pin body and the spring are provided in the cavity of the trigger, and one end of the spring abuts against the inner wall of the spherical end of the ejector pin body and the other end abuts against the bottom end of the trigger cavity, the ends of the eight ribs of the outer ring of the front section of the ejector pin body abut against the bottom corners of the grooves on the four walls of the rectangular cavity, the first boss and the second boss abut against the bottom edges of the grooves on the four walls of the rectangular cavity respectively, and the ridge of the outer ring of the end of the ejector pin body is located in the circular cavity and is clearance-fitted. This structure overcomes the defects of the traditional ejector pin, reduces the friction between the ejector pin and the rectangular cavity at the front end of the trigger, avoids the ejector pin from shaking in the rectangular cavity, improves the convenience of assembly, ensures the reliability and flexibility of the combination switch operation, and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0010] Figure 1 This is a schematic diagram of the ejector pin structure of the automobile combination switch trigger of the present invention;

[0011] Figure 2 This is a schematic diagram of the ejector pin body in this structure;

[0012] Figure 3 for Figure 2 A-direction schematic diagram;

[0013] Figure 4 This is a schematic cross-sectional view of the ejector pin body in this structure;

[0014] Figure 5 This is a schematic diagram of the assembly of the ejector pin body and the trigger in this structure. DETAILED DESCRIPTION

[0015] Implementation example Figures 1 to 5As shown, the ejector pin structure for the automobile combination switch trigger of the present invention includes a trigger 1, an ejector pin body 2 and a spring 3. The trigger 1 is provided with a cavity along the axial direction. The front section of the cavity is a rectangular cavity 11 and the rear section is a circular cavity 12. The four walls of the rectangular cavity 11 are provided with grooves 13. The adjacent grooves 13 form mutually perpendicular right-angled sides 14. The ejector pin body 2 is a hollow cylindrical body with a spherical surface 21 at the front end. The outer ring of the front section of the ejector pin body 2 is provided with eight ribs 22 at intervals along the length direction. The outer ring of the middle section of the ejector pin body 2 is symmetrically provided with a first boss 23 in the vertical direction and a second boss 24 in the horizontal direction. The outer ring of the end of the ejector pin body 2 is symmetrically provided with a first boss 23 in the vertical direction and a second boss 24 in the horizontal direction. A ridge 25 is provided in the direction, and an expanded arc 26 is provided on the inner ring along the circumferential direction. The spring 3 is provided in the hollow cavity 27 of the ejector pin body 2. The ejector pin body 2 and the spring 3 are provided in the cavity of the trigger 1, and one end of the spring 3 abuts against the inner wall of the spherical end of the ejector pin body 2, and the other end abuts against the bottom end of the cavity of the trigger 1. The ends of the eight ribs 22 on the outer ring of the front section of the ejector pin body 2 respectively abut against the bottom corners of the grooves 13 on the four walls of the rectangular cavity 11, and the first boss 23 and the second boss 24 respectively abut against the bottom edges of the grooves 13 on the four walls of the rectangular cavity 11. The ridge 25 on the outer ring at the end of the ejector pin body 2 is located in the circular cavity 12 and is clearance-fitted.

[0016] Preferably, the height of the first boss 23 is greater than the height of the second boss 24, and the spacing between the end faces of the two first bosses 23 and the end faces of the two second bosses 25 matches the length and width of the rectangular cavity 11. The height difference between the total height of the first and second bosses ensures that the ejector pin body is unique when assembled within the rectangular cavity of the trigger, thereby improving the ease of component assembly.

[0017] Preferably, the eight ribs 22 on the outer ring of the front section of the ejector pin body 2 have rounded ends. When the ejector pin slides within the trigger cavity under the action of the spring, the rounded corners of the ribs contact and rub against the bottom corners of the grooves in the four walls of the rectangular cavity, transforming traditional surface contact into point contact. This significantly reduces friction, allowing the ejector pin to slide flexibly within the trigger cavity and improving the controllability of the combination switch trigger.

[0018] Preferably, the bases of the eight ribs 22 are provided with thinning grooves 29 on the outer ring of the ejector body 2. The thinning grooves make the ribs more elastic, allowing the ribs to deform accordingly when the ejector body slides within the trigger cavity, further facilitating the sliding of the ejector body, and reducing the gap between the ejector body and the trigger cavity, thereby preventing the ejector body from shaking within the trigger cavity.

[0019] This structure utilizes the sliding cooperation of the eight ribs on the front section of the ejector pin body and the grooves on the four walls of the rectangular cavity of the trigger, effectively reducing the friction force of the ejector pin body sliding in the trigger cavity, and achieving a gapless cooperation between the ejector pin body and the rectangular cavity of the trigger, thereby avoiding the ejector pin body from shaking in the trigger cavity; by arranging the first boss and the second boss in the middle part of the ejector pin body, the structure of the ejector pin body is unique when assembled to the trigger cavity, facilitating the assembly operation and improving the assembly efficiency; the ridge of the outer ring at the end of the ejector pin body is gap-matched with the circular cavity of the trigger, playing a guiding role for the ejector pin body to slide in the trigger cavity, ensuring that the ejector pin body slides smoothly; the expanded diameter arc of the inner ring at the end of the ejector pin body facilitates the installation of the spring, and at the same time makes the movement of the spring in the hollow cavity of the ejector pin body smooth and without jamming, thereby ensuring the driving force of the spring on the ejector pin body.

[0020] This structure effectively solves the problems of the combination switch trigger getting stuck due to sliding friction during the movement of the combination switch push pin and the trigger shaking due to the gap between the push pin and the trigger cavity, greatly improves the control performance of the combination switch trigger and ensures the quality of the combination switch product.

[0021] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of this patent application.

Claims

1. A push pin structure for a combination switch trigger of an automobile, comprising a trigger, a push pin body, and a spring, wherein the trigger is provided with a cavity along the axial direction, and wherein: The front section of the cavity is a rectangular cavity, and the rear section is a circular cavity. The four walls of the rectangular cavity are provided with grooves, and adjacent grooves form mutually perpendicular right angles. The ejector pin body is a hollow cylindrical body with a spherical front end. The outer ring of the front section of the ejector pin body is provided with eight ribs spaced apart along the length direction. The outer ring of the middle section of the ejector pin body is symmetrically provided with a first boss in the vertical direction and a second boss in the horizontal direction. The outer ring of the end of the ejector pin body is provided with a ridge along the circumferential direction, and the inner ring is provided with a diameter expansion arc along the circumferential direction. The spring is arranged in the hollow cavity of the ejector pin body, and the ejector pin body together with the spring is arranged in the cavity of the trigger, and one end of the spring abuts against the inner wall of the spherical end of the ejector pin body, and the other end abuts against the bottom end of the trigger cavity. The ends of the eight ribs on the outer ring of the front section of the ejector pin body respectively abut against the bottom corners of the grooves on the four walls of the rectangular cavity, and the first boss and the second boss respectively abut against the bottom edges of the grooves on the four walls of the rectangular cavity. The bulge of the outer ring at the end of the ejector pin body is located in the circular cavity and is clearance-fitted.

2. The ejector pin structure for a combination switch trigger of an automobile according to claim 1, characterized in that: The height of the first boss is greater than that of the second boss, and the distance between the end surfaces of the two first bosses and the distance between the end surfaces of the two second bosses match the length and width of the rectangular cavity.

3. The ejector pin structure for a combination switch trigger of an automobile according to claim 1 or 2, characterized in that: The ends of the eight convex ribs on the outer ring of the front section of the ejector pin body are rounded.

4. The ejector pin structure for a combination switch trigger of an automobile according to claim 3, characterized in that: The ends of the eight convex ribs are provided with thinning grooves on the outer ring of the ejector pin body.

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