Push rod switch

Abstract

The push rod switch comprises a push rod, a first contact piece and a second contact piece which are arranged on a switch shell, the push rod is provided with a driving part movably arranged in an inner cavity of the switch shell, and the first contact piece comprises an elastic piece protrusion which is arranged on a motion path of the driving part in a bending and extending mode. When the push rod moves, the push rod pushes the elastic piece protrusion to elastically shift towards the side close to or away from the second contact piece through the driving part so as to drive the first contact piece and the second contact piece to achieve contact or separation, and by means of the technical scheme, the contact area is remarkably increased through cooperation between the first contact piece and the second contact piece, and the current-carrying capacity is improved; by utilizing the elastic deformation capability of the elastic sheet bulge, the stable long-term compression resilience performance is ensured, the contact pressure of the contact is ensured, meanwhile, the arrangement of a traditional microswitch is omitted, the mounting structure is simplified, the production cost is reduced, the rated current capability is improved, and the requirements of high-power equipment are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of switch, concretely relates to a push rod switch. BACKGROUND

[0002] The push rod switch (push rod switch) is a kind of simple electronic components that can switch circuit loop, can automatically switch line when being subjected to external pressure, simple structure, reaction is fast, and manufacturing cost is low, so it is widely used in various electric appliances.

[0003] The prior art such as Chinese patent document CN213905202U discloses a push rod switch, including switch seat, push rod and micro switch with trigger button, the middle part of switch seat is equipped with push rod sliding groove, push rod can slide in push rod sliding groove, the lower end of push is equipped with trigger plate along the moving direction, first pressure surface and second pressure surface are adjacent on the trigger plate, the trigger button of micro switch is located on the side of second pressure surface, and at least part is located in the moving path of trigger plate, push rod drives trigger plate to move under external force, to realize circuit connection by trigger plate extruding trigger button of micro switch, from the above structure, it can be seen that the push rod switch is realized circuit conduction by trigger plate and micro switch extrusion contact, but the contact of this micro switch is small, and the current is small, so that the rated current of switch product is generally made smaller, and the adaptability is poor, and the setting cost is high. UTILITY MODEL CONTENTS

[0004] Therefore, the technical problem to be solved by the utility model lies in overcoming the problem that the push rod switch in the prior art is realized circuit conduction by trigger plate and micro switch extrusion contact, but the current of micro switch is small, so that the rated current of product is generally made smaller, and the setting cost is high.

[0005] To solve the above technical problems, the utility model provides a push rod switch, comprising:

[0006] The switch housing has an inner cavity.

[0007] The push rod is reciprocally arranged in the switch housing and includes a driving portion movably arranged in the inner cavity and an operating portion extending outside the switch housing.

[0008] The electrical contact assembly includes a first contact piece and a second contact piece arranged in the inner cavity and cooperating with each other to contact or separate, the first contact piece and the second contact piece are arranged on one side of the push rod and correspondingly provided with contact structures for contacting or separating, respectively, the first contact piece includes a spring tab protrusion elastically deformed under pressure and arranged on the movement path of the driving portion, and the driving portion drives the spring tab protrusion to elastically deviate towards the side of the second contact piece during movement to drive the first contact piece and the second contact piece to contact or separate.

[0009] As a preferred solution, the switch housing comprises a first inner cavity provided with a driving part and a second inner cavity arranged at one side of the first inner cavity, the first contact piece and the second contact piece are arranged in the second inner cavity through a positioning structure, and the elastic piece protrusion protrudes from the second inner cavity to the first inner cavity in a V-shaped structure and cooperates with the driving part.

[0010] As a preferred solution, the elastic piece protrusion comprises a V-shaped part protruding towards the side of the driving part, and two elastic piece parts connected to the two sides of the V-shaped part, one of the elastic piece parts is located at one end of the first contact piece and is arranged opposite to one end of the second contact piece.

[0011] As a preferred solution, the contact structure comprises a first contact head arranged at one end of the first contact piece, and a second contact head arranged at one end of the second contact piece; the elastic piece protrusion drives the first contact head and the second contact head to keep in contact in an uncompressed state; or, the elastic piece protrusion drives the first contact head and the second contact head to keep separated in an uncompressed state.

[0012] As a preferred solution, the driving part is a driving block movably arranged in the inner cavity, one side of the driving block is provided with a driving side surface in contact with the elastic piece protrusion; the operating part is an operating rod connected to one end of the driving part, and the switch housing is provided with a reset spring connected to the other end of the driving part.

[0013] As a preferred solution, the switch housing comprises a bottom shell and an upper cover, the positioning structure comprises two sets of clamping table structures arranged in the bottom shell, and two positioning clamping grooves arranged on the two sets of clamping table structures and clamped and fixed with the first contact piece and the second contact piece respectively, and the two sets of clamping table structures are distributed along the extension of the isolation boss.

[0014] As a preferred solution, at least one set of positioning clamping blocks are arranged on the inner walls of the two sides of the positioning clamping groove, and the first contact piece or the second contact head is clamped and pressed by the at least one set of positioning clamping blocks when being arranged in the positioning clamping groove.

[0015] As a preferred solution, the upper cover is correspondingly provided with two limiting bosses which are arranged to abut on the two clamping table structures respectively and form limiting cooperation with the first contact piece and the second contact piece.

[0016] As a preferred solution, a guide groove is arranged in the switch housing along the moving direction of the push rod, and a guide block is arranged at the bottom of the driving part and slidably connected in the guide groove.

[0017] As a preferred solution, the switch housing is provided with a partition connected between the two card table structures, and the partition is connected with the two sets of card table structures in the switch housing to form a wiring cavity separated from the second inner cavity, the switch housing is provided with a threading hole communicating with the wiring cavity, and the other end of the first contact piece and the second contact piece is bent to form a wiring part accommodated in the wiring cavity.

[0018] The technical scheme of the utility model has the following advantages compared with the prior art:

[0019] 1. In the push rod switch, the electric contact assembly adopts the first contact piece and the second contact piece arranged in the switch housing, the first contact piece has a spring tab protruding and arranged on the movement path of the driving part, and when the push rod is forced to move, the spring tab protruding is pushed by the driving part to elastically deviate, so that the first contact piece and the second contact piece are driven to realize contact or separation. The advantages of this design are as follows: firstly, the contact area between the first contact piece and the second contact piece is significantly increased, the rated current capacity is improved, the current carrying capacity can be further improved by optimizing the shape of the contact piece (such as wide design or bifurcated structure) to meet the demand of high-power equipment; secondly, the first contact piece utilizes the elastic deformation capacity of the spring tab protruding, the action is sensitive, the long-term compression and rebound performance is stable, the contact pressure is stable, the mechanical life and reliability are enhanced, and by optimizing the protruding height or pre-pressure of the spring tab protruding, the operation force required for triggering the push rod switch can be flexibly customized to adapt to different user feel requirements; thirdly, the technical scheme eliminates the setting of the traditional micro switch, that is, high-precision micro switch manufacturing process is not required, the contact piece structure can be mass produced by stamping or laser cutting, the production efficiency is improved, and the production cost is reduced.

[0020] 2. In the push rod switch, the spring tab protruding is V-shaped and protrudes from the second inner cavity to the first inner cavity to cooperate with the driving part. This structure has the advantages of uniform stress distribution, good elastic rebound performance, stable contact, easy manufacturing, vibration resistance, etc. The spring tab protruding utilizes the symmetric geometric characteristics of the V-shaped structure to make the stress evenly distributed along the two side slopes when it is deformed under pressure, avoiding local stress concentration, reducing material fatigue risk, prolonging elastic life, and the symmetry and elastic energy storage characteristics of the V-shaped structure can absorb external vibration energy, having vibration resistance and impact resistance, and ensuring the stability of the contact.

[0021] 3. The push rod switch provided by the utility model, through being provided with positioning clamping grooves on the two mounting clamping tables of the bottom shell respectively, and being provided with positioning clamping blocks on the inner walls of the two sides of the positioning clamping grooves, the first contact piece and the second contact piece are clamped into the two positioning clamping grooves respectively and are extruded and clamped by the positioning clamping blocks, the contact pieces can be fixed more tightly through the positioning clamping blocks, loosening is prevented, the cooperation of the positioning clamping grooves and the positioning clamping blocks plays a limiting and restraining action on the first contact piece and the second contact piece, the situation that the two contact pieces deviate or fall off in vibration, impact or frequent operation is prevented, the installation structure has good stability and displacement resistance; in addition, the contact pieces can be directly clamped into the positioning clamping grooves to complete the fixing, the traditional welding, riveting or screw fastening process is omitted, the assembly time is shortened, the utility model is suitable for automatic production lines and significantly improves the installation stability and economy. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0023] Figure 1 The structural schematic diagram of the push rod switch provided by the utility model is shown in the figure.

[0024] Figure 2 The sectional structure schematic diagram of the push rod switch provided by the utility model is shown in the figure.

[0025] Figure 3 The installation structure schematic diagram of the electric contact assembly of the utility model is shown in the figure.

[0026] Figure 4 The enlarged structure schematic diagram of the positioning clamping groove of the utility model is shown in the figure.

[0027] Figure 5 The structure schematic diagram of the first contact piece of the utility model is shown in the figure.

[0028] BRIEF DESCRIPTION OF DRAWINGS: 1, switch shell; 11, first inner cavity; 12, second inner cavity; 13, bottom shell; 14, upper cover; 15, clamping table structure; 16, partition plate; 17, limiting boss; 18, guide groove; 2, push rod; 21, driving part; 22, operating part; 3, first contact piece; 31, first contact; 32, spring piece protrusion; 321, V-shaped part; 322, spring piece part; 4, second contact piece; 42, second contact; 5, reset spring; 6, positioning clamping groove; 7, positioning clamping block; 8, wiring cavity; 9, threading hole. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] Example

[0033] This utility model provides, for example Figures 1-5 A push-rod switch is shown, comprising a switch housing 1 with an inner cavity, a push rod 2 and an electrical contact assembly disposed on the switch housing 1, wherein the push rod 2 is reciprocally disposed on the switch housing 1, and includes a drive part 21 movably disposed in the inner cavity and an operating part 22 extending out of the switch housing 1; the electrical contact assembly includes a first contact piece 3 and a second contact piece 4 disposed in the inner cavity and engaging or disengaging with each other, the first contact piece 3 and the second contact piece 4 being arranged on one side of the push rod 2 and respectively having contact structures engaging or disengaging with each other, the first contact piece 3 including a spring protrusion 32 that is bent and extended along the movement path of the drive part 21 and is elastically deformable under pressure, the drive part 21 pushing the spring protrusion 32 to elastically shift towards or away from the second contact piece 4 during movement, so as to drive the first contact piece 3 and the second contact piece 4 to engage or disengage.

[0034] The above embodiment is the core technical solution of the present embodiment. When the push rod 2 is forced to move, the elastic sheet protrusion 32 is pushed by the driving part 21 to cause elastic deviation, thereby driving the first contact sheet 3 and the second contact sheet 4 to realize contact or separation. The advantages of this design are as follows: first, the contact area between the first contact sheet 3 and the second contact sheet 4 is significantly increased, and the current carrying capacity can be further improved by optimizing the shape of the contact sheet (such as wide design or bifurcated structure), thereby improving the rated current capacity and meeting the demand of high-power equipment; second, the first contact sheet 3 utilizes the elastic deformation capacity of the elastic sheet protrusion 32, and has high action sensitivity, stable long-term compression and rebound performance, stable contact pressure of the contact, enhanced mechanical life and reliability, and by optimizing the protrusion height or pre-pressure of the elastic sheet protrusion 32, the operation force required for triggering the push rod switch can be flexibly customized to adapt to different user feel requirements; third, the technical solution design eliminates the setting of the traditional micro switch, that is, high-precision micro switch manufacturing process is not required, and the contact sheet structure can be mass produced by stamping or laser cutting, thereby improving production efficiency and reducing production cost.

[0035] Further preferably, as shown in Figure 1 and Figure 3 The switch housing 1 includes a first inner cavity 11 provided with a driving part 21 and a second inner cavity 12 arranged on one side of the first inner cavity 11, and the first inner cavity 11 and the second inner cavity 12 constitute the inner cavity of the switch housing 1. The first contact sheet 3 and the second contact sheet 4 are arranged in the second inner cavity 12 through a positioning structure, and the elastic sheet protrusion 32 in V-shaped structure protrudes from the second inner cavity 12 into the first inner cavity 11 and cooperates with the driving part 21. This structure arrangement and the V-shaped structure design of the elastic sheet protrusion 32 have the advantages of uniform stress distribution, good elastic rebound performance, stable contact, convenient manufacturing, vibration resistance, etc. The elastic sheet protrusion 32 utilizes the symmetric geometric characteristics of the V-shaped structure to make the stress evenly distributed along the two sides of the inclined surface when it is deformed under pressure, thereby avoiding local stress concentration, reducing material fatigue risk, prolonging elastic life, and the symmetry and elastic energy storage characteristics of the V-shaped structure can absorb external vibration energy, have good vibration resistance and impact resistance, and ensure the stability of the contact.

[0036] As a specific structural arrangement, the elastic sheet protrusion 32 includes a V-shaped portion 321 protruding toward the drive portion 21 side, and two elastic sheet portions 322 connected to both sides of the V-shaped portion 321, one of the elastic sheet portions 322 is located at one end of the first contact 3 and is arranged opposite to one end of the second contact 4, the contact structure includes a first contact 31 arranged at one end of the first contact 3, and a second contact 42 arranged at one end of the second contact 4, that is, the first contact 31 is arranged on one of the elastic sheet portions of the elastic sheet protrusion 32, when the contact structure of the push rod switch is designed as a normally closed contact design, the elastic sheet protrusion 32 drives the first contact 31 and the second contact 42 to maintain contact in the non-pressed state, and drives the first contact 31 and the second contact 42 to be separated when the elastic sheet protrusion 32 is driven by the push rod 2; or, when the contact structure of the push rod switch is designed as a normally open contact design, the elastic sheet protrusion 32 drives the first contact 31 and the second contact 42 to maintain separation in the non-pressed state, and drives the first contact 31 and the second contact 42 to be in contact when the elastic sheet protrusion 32 is driven by the push rod 2.

[0037] As shown in Figure 3 The drive portion 21 is a drive block movably arranged in the inner cavity, one side of the drive block is provided with a drive side surface in contact with the elastic sheet protrusion 32, the switch housing 1 is provided with a guide groove 18 extending along the movement direction of the push rod 2, the guide groove 18 is located in the first inner cavity 11, the bottom of the drive portion 21 is provided with a guide block slidingly connected in the guide groove 18, the guide block and the guide groove 18 cooperate to guide the movement of the push rod 2, the operation portion 22 is an operation rod connected to one end of the drive portion 21, the switch housing 1 is provided with a reset spring 5 connected to the other end of the drive portion 21, the reset spring 5 applies an elastic force to the push rod 2 to reset the movement, that is, the push rod 2 is reset under the action of the reset spring 5 after the external force is removed.

[0038] In this embodiment, refer to Figure 2The switch shell 1 includes a bottom shell 13 and an upper cover 14, the positioning structure includes two sets of clamping table structures 15 arranged in the bottom shell 13, and two positioning clamping grooves 6 arranged on the two sets of clamping table structures 15 and clamped and fixed with the first contact 3 and the second contact 4 respectively, wherein two sets of positioning clamping blocks 7 are arranged on the inner walls of the two sides of the positioning clamping groove 6, and the first contact 3 or the second contact 4 is clamped and fixed by the two sets of positioning clamping blocks 7 when being arranged in the positioning clamping groove 6. Through the positioning clamping blocks 7, the contact can be fixed more tightly to prevent loosening. Through the cooperation of the positioning clamping groove 6 and the positioning clamping block 7, the first contact 3 and the second contact 4 are limited and constrained to prevent the two contacts from deviating or falling off in vibration, impact or frequent operation. The installation structure has good stability and displacement resistance. In addition, the first contact 3 or the second contact 4 can be directly clamped into the positioning clamping groove 6 to complete the fixation, thereby omitting the traditional welding, riveting or screw fastening process, shortening the assembly time, being suitable for automatic production lines, and significantly improving the installation stability and economy.

[0039] As shown in Figure 2 The upper cover 14 is provided with two limiting bosses 17 corresponding to the two clamping table structures 15 and limiting the first contact 3 and the second contact 4, and the two contacts arranged in the two positioning clamping grooves 6 are pressed by the two limiting bosses 17 to prevent the first contact 3 and the second contact 4 from being pulled out of the positioning clamping groove 6, thereby further improving the stability of the installation of the two contacts.

[0040] As shown in Figure 3 The switch shell 1 is provided with a partition plate 16 connected between the two clamping table structures 15, and the two clamping table structures 15 are connected by the partition plate 16 to form a wiring cavity 8 separated from the second inner cavity 12 in the switch shell 1. The switch shell 1 is provided with a wire hole 9 communicating with the wiring cavity 8, and the other end of the first contact 3 and the second contact 4 is provided with a wiring part accommodated in the wiring cavity 8, so that the wire is connected with the wiring part after passing through the wire hole 9 and entering the wiring cavity 8. This design insulates and separates the wiring cavity 8 from the second inner cavity 12 to increase the safety electrical distance and improve the protection, and the wiring cavity meets the wiring requirements of the wire in the switch shell, and the wiring is neat and beautiful.

[0041] Obviously, the above embodiments are only examples for clearly illustrating, and not limiting the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments do not need to be exhausted, and the obvious changes or variations still fall within the protection scope of the utility model.

Claims

1. A push rod switch characterized by, The utility model relates to a switch, including: Switch housing (1) have inner chamber; Push rod (2) mobile setting in the switch housing (1), it includes the drive part (21) that moves in the inner chamber, and the operating part (22) that stretches out switch housing (1) outside side; Electric contact assembly, including setting in the first contact blade (3) and second contact blade (4) of inner chamber, the first contact blade (3) and second contact blade (4) are arranged in one side of push rod (2), and respectively with the contact structure of cooperation contact or separation is set up, the first contact blade (3) includes the spring tab (32) of elastic deformation under pressure that is bent and extends in the movement path of drive part (21) and is pressed, drive part (21) in the process of moving push spring tab (32) to the elastic offset of one side close to or away from second contact blade (4), to drive the first contact blade (3) and second contact blade (4) realize contact or separation.

2. The push rod switch according to claim 1, characterized by: The switch housing (1) includes the first inner chamber (11) of being equipped with drive part (21) and the second inner chamber (12) of being arranged in one side of first inner chamber (11), the first contact blade (3) and second contact blade (4) are arranged in the second inner chamber (12) through the positioning structure, the spring tab (32) is V-shaped structure and is protruding from second inner chamber (12) to first inner chamber (11) and is matched with drive part (21).

3. The push rod switch of claim 2, wherein: The spring tab (32) includes the V-shaped part (321) of protruding towards one side of drive part (21), and two spring tab parts (322) are connected to both sides of V-shaped part (321), wherein one of spring tab parts (322) is located at one end of the first contact blade (3) and is arranged opposite to one end of the second contact blade (4).

4. The push rod switch of claim 3, wherein: The contact structure includes the first contact (31) arranged at one end of the first contact blade (3), and the second contact (42) arranged at one end of the second contact blade (4); the spring tab (32) drives the first contact (31) and the second contact (42) to keep contact in the non-pressured state; or, the spring tab (32) drives the first contact (31) and the second contact (42) to keep separation in the non-pressured state.

5. The push rod switch of claim 2, wherein: The drive part (21) is a drive block movably arranged in the inner chamber, one side of the drive block is provided with a drive side surface matched with the spring tab (32); the operating part (22) is an operating rod connected to one end of the drive part (21), the switch housing (1) is provided with a reset spring (5) connected to the other end of the drive part (21).

6. The pushrod switch of any of claims 2-5, wherein: The switch housing (1) includes a bottom shell (13) and an upper cover (14), the positioning structure includes two sets of clamping table structures (15) arranged in the bottom shell (13), and two positioning clamping grooves (6) arranged on the two sets of clamping table structures (15) and fixedly connected with the first contact blade (3) and the second contact blade (4), respectively.

7. The push rod switch of claim 6, wherein: At least one set of positioning clamping blocks (7) are arranged on the inner walls of both sides of the positioning clamping groove (6), and the first contact blade (3) or the second contact (42) is clamped and pressed by the at least one set of positioning clamping blocks (7) when being arranged in the positioning clamping groove (6).

8. The push rod switch of claim 7, wherein: The upper cover (14) is provided with two limiting bosses (17) respectively abutting on two clamping table structures (15) and forming limiting cooperation with the first contact piece (3) and the second contact piece (4).

9. The push rod switch of claim 6, wherein: The switch shell (1) is provided with a partition plate (16) connected between the two clamping table structures (15), and the two sets of clamping table structures (15) are connected by the partition plate (16) in the switch shell (1) to form a wiring cavity (8) separated from the second inner cavity (12), the switch shell (1) is provided with a threading hole (9) communicating with the wiring cavity (8), and the other end of the first contact piece (3) and the second contact piece (4) is bent to form a wiring part accommodated in the wiring cavity (8).

10. The pushrod switch of claim 1, wherein: The switch shell (1) is provided with a guide groove (18) extending along the moving direction of the push rod (2), and the bottom of the driving part (21) is provided with a guide block slidingly connected in the guide groove (18).

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