Automobile door handle microswitch

Abstract

The utility model discloses an automobile door handle microswitch, relates to the field of switches, and solves the problems of cost increase, short service life and the like caused by the arrangement of a tension spring. An elastic pressing movable contact piece made of elastic metal materials is installed in the shell and comprises a contact section and a bent section, the contact section is arranged in the interval and integrally extends to the upper end of the bent section, the upper end of the bent section extends downwards and towards the direction of the contact section to form a C-shaped shape, and the bent section is located at the pressing position of the button. The upper end of the bending section contacts with the button and the lower end of the bending section abuts against the housing. According to the microswitch, the number of parts is reduced, the assembling difficulty is reduced, automatic equipment can be used for assembling, the production efficiency can be improved, and the internal structure of the microswitch is more compact; besides, the C-shaped bending section of the elastic pressing movable contact piece forms more durable elastic performance, and the shape of the C-shaped bending section has good elastic deformation recovery capability, so that the fatigue of the elastic material is relieved, and the service life of the switch is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of switches, in particular to a micro switch for a car door handle. Background Art

[0002] Nowadays, micro switches are widely used in the fields of automobiles, instruments, power systems, household appliances, electrical equipment, etc. The principle is that the external mechanical force acts on the action spring through the transmission element (pin, button, lever, roller, etc.). When the action spring moves to the critical point, an instantaneous action is generated, so that the moving contact at the end of the action spring is quickly connected or disconnected with the fixed contact. Taking the Chinese utility model patent CN209804511U, a tension spring type micro switch as an example, it is disclosed that a tension spring is passed through the support sheet, one end of the tension spring is hooked on the hook sheet, and the other end is hooked on the moving contact sheet. The button is located above the tension spring and pressed in the middle position of the tension spring. After the button presses the tension spring, the position of the moving contact sheet will move, and the moving contact will contact the normally open static contact or the normally closed static contact, thereby realizing the switching function of the switch. However, the addition of the tension spring means an increase in the number of parts, which will correspondingly increase the cost of the switch, occupy more internal space, and the assembly of the tension spring is difficult to achieve automated assembly, which increases the complexity of assembly. In addition, the button of this patent is pressed at the middle position of the tension spring, and the tension spring is subjected to the pressing force in its radial direction, which is prone to elastic degradation or even fatigue fracture under long-term use, shortening the service life of the product. Summary of the invention

[0003] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a micro switch for a car door handle, which solves the problems of increased cost and short service life caused by the setting of a tension spring.

[0004] The technical solution of the utility model includes a shell, a button, a common terminal, a first connection end and a second connection end, the button is movably arranged on the shell, the common terminal, the first connection end and the second connection end are respectively fixed on the shell, there is a gap between the first connection end and the second connection end, a spring-loaded movable contact piece made of elastic metal material is installed in the shell, the spring-loaded movable contact piece includes a contact section and a bending section, the contact section is placed in the gap, the contact section extends integrally to the upper end of the bending section, the upper end of the bending section extends downward and toward the contact section to form a "C" shape, the bending section is located at the pressing position of the button, the upper end of the bending section contacts the button and its lower end abuts against the shell.

[0005] By adopting the above technical solution, an integrated spring-loaded movable contact piece is directly integrated and installed in the shell, which eliminates the traditional tension spring, reduces the number of parts, and reduces the difficulty of assembly. It can be assembled using automated equipment, which helps to improve production efficiency. The internal structure of the micro switch is more compact, which is conducive to reducing the overall size. In addition, the "C"-shaped bending section of the spring-loaded movable contact piece forms a more lasting elastic property, and its shape has good elastic deformation recovery ability, thereby reducing the fatigue of the elastic material, extending the service life of the switch, avoiding the elastic decay and fatigue fracture of the tension spring due to radial force, and improving the reliability and stability of the product.

[0006] In a possible design, the common terminal includes an upright support frame with a fulcrum slot formed therein, and support legs are integrally extended from both sides of the contact section in the width direction, with ends of the support legs supported on the fulcrum slot.

[0007] With the above design, the supporting effect of the supporting foot makes the contact section always in contact with the first connecting end, and after the bending section is bent and unloaded, the elastic support contact section quickly returns to its position, so that the spring-loaded moving contact piece can maintain its original elasticity even after being pressed and used many times, avoiding uneven deformation or premature fatigue caused by excessive local force, and improving the service life of the spring piece.

[0008] In a possible design, a locking end is provided on the outer side of the support leg in the width direction, and the locking end contacts the support frame to form a limit.

[0009] The above design effectively prevents the spring-loaded movable contact from excessive displacement when frequently receiving pressing force, ensures that the spring-loaded movable contact is within a preset range of motion, ensures long-term stable operation of the switch, and simplifies the assembly steps and reduces the difficulty of assembly.

[0010] In a possible design, a contact hole is opened in the contact segment, a contact column is adapted and fixed in the contact hole, the contact column lies horizontally in the contact hole and the axial direction of the contact column is consistent with the width direction of the contact segment, and the contact column runs through the thickness direction of the contact segment.

[0011] The above design actually utilizes the adaptability characteristics of the outer arc surface of the contact column and the contact hole, so that the contact column can be more conveniently embedded in the contact section and can be firmly installed on the contact section; in addition, the contact column can switch to contact the first connection end and the second connection end, and the contact area of ​​the two is basically the same, balancing the contact resistance on both sides to ensure stable and balanced contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of a specific embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the internal structure of a specific embodiment of the utility model;

[0014] Figure 3 It is an exploded view of a specific embodiment of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the spring-pressed movable contact piece of the utility model;

[0016] Among them, 1. shell; 2. button; 3. common terminal; 4. first connection end; 5. second connection end; 6. spring-loaded movable contact piece; 61. contact section; 62. bending section; 31. support frame; 311. fulcrum groove; 63. support foot; 64. locking end; 611. contact hole; 65. contact column. DETAILED DESCRIPTION

[0017] like Figure 1-4 The automobile door handle micro switch shown in the figure includes a shell 1, a button 2, a common terminal 3, a first connection end 4 and a second connection end 5. The button 2 is movably arranged on the shell 1, and the common terminal 3, the first connection end 4 and the second connection end 5 are respectively fixed on the shell 1. There is a gap between the first connection end 4 and the second connection end 5. A spring-loaded movable contact piece 6 made of elastic metal material is installed in the shell 1. The spring-loaded movable contact piece 6 includes a contact section 61 and a bending section 62. The contact section 61 is placed in the gap to switch the contact with the first connection end 4 and the second connection end 5. The contact section 61 extends integrally to connect the upper end of the bending section 62. The upper end of the bending section 62 extends downward and toward the contact section 61 to form a "C" shape. The bending section 62 is located at the pressing position of the button 2. The upper end of the bending section 62 contacts the button 2 and its lower end abuts against the shell 1. When working, the button 2 is pressed, and the pressing force of the button 2 acts on the curved section 62. The curved section 62 is forced to move the upper end toward the lower end, and the contact section 61 is forced to move downward following the upper end of the curved section 62. The contact section 61 switches from contacting the first connection end 4 to contacting the second connection end 5. After the button 2 is pressed and the force is released, the curved section 62 is elastically reset, driving the contact section 61 to return to contact the first connection end 4. This is equivalent to integrating the movable contact piece and the tension spring of the prior art into an integrated elastic movable contact piece 6, realizing the switching of the switch on and off state, and has the advantages of easy assembly, small size, and long-lasting elasticity.

[0018] The common terminal 3 includes an upright support frame 31, in which a fulcrum groove 311 is provided. Support legs 63 are integrally extended on both sides of the contact section 61 in the width direction. The support legs 63 extend toward the support frame 31, and the ends of the support legs 63 are supported on the fulcrum groove 311. The supporting effect of the support legs 63 causes the contact section 61 to tilt upward, so that it is always in contact with the first connection end 4. After pressing the button 2, the contact section 61 is bent and swung downward under the force, and the support legs 63 swing downward around the fulcrum groove 311. After the bending section 62 is bent and unloaded, the support legs 63 elastically support the contact section 61 to return to its original position quickly. The support legs 63 can enhance the elastic reset ability of the spring-loaded movable contact piece 6 and provide anti-elastic fatigue performance.

[0019] A locking end 64 is provided on the outer side of the support foot 63 in the width direction, and the locking end 64 contacts the outer side wall of the support frame 31 to form a limit. The locking ends 64 on both sides are located on the outer side of the support frame 31, limiting the horizontal movement of the spring-loaded movable contact piece 6 and ensuring smooth switching of the spring-loaded movable contact piece 6.

[0020] A contact hole 611 is provided in the contact section 61, and a contact column 65 is adapted and fixed in the contact hole 611. The contact column 65 lies horizontally in the contact hole 611 and the axial direction of the contact column 65 is consistent with the width direction of the contact section 61. The contact column 65 runs through the thickness direction of the contact section 61. The outer arc surface of the contact column 65 fits tightly with the wall of the contact hole 611, avoiding looseness or falling off, and improving the reliability of the overall structure. The contact area of ​​the contact column 65 is basically the same as that of the first connection terminal 4 and the second connection terminal 5, which helps to balance the electrical load on both sides, helps to maintain the consistency of the contact resistance on both sides, and improves the electrical performance stability of the switch.

Claims

1. A car door handle micro switch, comprising a housing (1), a button (2), a common terminal (3), a first connection end (4) and a second connection end (5), wherein the button (2) is movably arranged on the housing (1), the common terminal (3), the first connection end (4) and the second connection end (5) are respectively fixed on the housing (1), and there is a gap between the first connection end (4) and the second connection end (5), characterized in that: A spring-loaded movable contact piece (6) made of an elastic metal material is installed in the housing (1), and the spring-loaded movable contact piece (6) comprises a contact section (61) and a bent section (62). The contact section (61) is placed in the interval, and the contact section (61) extends integrally to the upper end of the bent section (62). The upper end of the bent section (62) extends downward and toward the contact section (61) to form a "C" shape. The bent section (62) is located at the pressing position of the button (2), and the upper end of the bent section (62) contacts the button (2) and the lower end thereof abuts against the housing (1).

2. The automobile door handle micro switch according to claim 1, characterized in that: The common terminal (3) comprises an upright support frame (31), a fulcrum slot (311) being provided in the support frame (31), support legs (63) extending integrally from both sides of the contact section (61) in the width direction, and ends of the support legs (63) being supported on the fulcrum slot (311).

3. The automobile door handle micro switch according to claim 2, characterized in that: A locking end (64) is provided on the outer side of the support leg (63) in the width direction, and the locking end (64) contacts the support frame (31) to form a limit position.

4. The automobile door handle micro switch according to claim 1 or 2, characterized in that: A contact hole (611) is provided in the contact section (61), a contact column (65) is adapted and fixed in the contact hole (611), the contact column (65) lies horizontally in the contact hole (611), and the axial direction of the contact column (65) is consistent with the width direction of the contact section (61), and the contact column (65) runs through the thickness direction of the contact section (61).

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