Improved structure of screw hole contact spring

Abstract

The utility model belongs to contact spring technology field especially improves structure of a kind of screw hole contact spring, including spring body, the side of spring body is provided with through-hole, the middle position of spring body is provided with elastic contact piece hole slightly lower, the side fixedly connected with corrugated elastic arm fixed plate of elastic contact piece hole, the side of corrugated elastic arm fixed plate is equipped with corrugated elastic arm. The corrugated elastic arm of corrugated elastic arm and the U-shaped stress release groove of its root can disperse the impact force, buffer the vibration of machine case, elastic contact piece anti -drop microtooth group and the inner wall of screw hole form one-way occlusion, avoid falling, contact problem such as bad due to vibration, shape memory alloy wire can realize deformation self-recovery, ensure that elastic contact piece always keep good contact, inertial actuator offsets resonance through reverse vibration, thermoelectric film is actively contracted when temperature rises and enhances the shrinkage force.

Description

Technical Field

[0001] This utility model belongs to the field of contact spring technology, specifically relating to an improved structure of a screw hole contact spring. Background Technology

[0002] Contact spring technology primarily involves the use of spring technology to achieve information transmission, energy conversion, or structural connection through physical contact. This industry is widely used in electronics, automotive, aerospace, medical, and machinery manufacturing industries. By industry definition, contact springs refer to miniature electronic components that achieve signal transmission or mechanical connection through mechanical contact. They are characterized by compact structure, high reliability, and low cost, playing a vital role in electronic devices.

[0003] Existing screw-hole contact springs have several problems, including stress concentration, fatigue fracture of the elastic contact arm after repeated vibration, vibration transmission during contact, which can cause the vibration of the hard drive to be transmitted to the chassis during operation, and vibration can lead to poor contact of the elastic contact springs. The smooth contact surface of traditional elastic contact springs is prone to loosening under impact conditions. The problem that this device addresses is how to effectively prevent elastic contact springs from being shaken and detached. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides an improved structure for a screw hole contact spring, solving the problem of how to effectively prevent shock and detachment of the elastic contact spring.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved structure for a screw hole contact spring, comprising a spring body, a through hole on one side of the spring body, an elastic contact hole at a lower center position of the spring body, a corrugated elastic arm fixing plate fixedly connected to one side of the elastic contact hole, a corrugated elastic arm mounted on one side of the corrugated elastic arm fixing plate, a U-shaped stress relief groove at the bottom of the corrugated elastic arm, a shape memory alloy wire embedded inside the U-shaped stress relief groove, and a thermoelectric thin film fixedly mounted on the surface of the corrugated elastic arm. The top of the pleated elastic arm is fixedly connected to an elastic contact plate base. An inertial actuator bracket is fixedly connected inside the elastic contact plate base. An inertial actuator is installed in the middle of the inertial actuator bracket. An elastic contact piece is fixedly connected to the upper surface of the elastic contact plate base. An anti-detachment micro-tooth assembly is provided on the top of the elastic contact piece. A buffer pad is installed on the surface of the anti-detachment micro-tooth assembly. An elastic clamping piece is fixedly connected to the side of the spring body away from the through hole. A spring body slot is formed on the side of the spring body near the elastic clamping piece. An elastic clamping piece tooth is fixedly installed on the top of the elastic clamping piece. Preferably, there are two through holes, located on the left and right sides of the elastic contact piece hole, respectively.

[0006] Preferably, the elastic clamping piece is arc-shaped, and the width of the clamping teeth of the elastic clamping piece is the same as the width of the elastic clamping piece.

[0007] Preferably, the wavy pleated elastic arm has a wavy shape, and the wavy pleated elastic arm is inclined upward at a certain angle to the main body of the spring.

[0008] Preferably, the number of elastic contact pieces is six, and the number of elastic contact piece anti-detachment micro-tooth groups and buffer pads are both six.

[0009] Preferably, the elastic contact piece is petal-shaped, and there is a gap between each elastic contact piece.

[0010] Preferably, the surface of the elastic contact sheet is covered with a silicone-graphene composite coating, and the coating thickness is 0.35 mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The wavy pleats of the elastic arm and the U-shaped stress relief groove at its root can disperse the installation impact force and buffer the vibration of the chassis. The anti-detachment micro-tooth assembly of the elastic contact piece forms a one-way engagement with the inner wall of the screw hole, avoiding problems such as detachment and poor contact caused by vibration. The shape memory alloy wire can realize deformation self-recovery, ensuring that the elastic contact piece always maintains good contact. The inertial actuator cancels resonance through reverse vibration. The thermoelectric film actively contracts when the temperature rises to enhance the tightening force. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a second three-dimensional structural diagram of the present invention;

[0016] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 4 This utility model Figure 2 Enlarged diagram of point B in the middle.

[0018] In the diagram: 1. Spring body; 2. Through hole; 3. Wavy pleated elastic arm; 4. Elastic contact plate hole; 5. Elastic clamping plate; 6. Spring body slot; 7. Elastic contact plate; 8. Elastic clamping plate teeth; 9. Elastic contact plate base plate; 10. U-shaped stress relief groove; 11. Thermoelectric film; 12. Screw hole contact spring; 13. Elastic contact plate anti-detachment micro-tooth assembly; 14. Buffer pad; 15. Wavy pleated elastic arm fixing plate; 16. Shape memory alloy wire; 17. Inertial actuator bracket; 18. Inertial actuator. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This utility model provides the following technical solution: an improved structure of a screw hole contact spring, including a spring body 1, a through hole 2 on one side of the spring body 1, an elastic contact hole 4 at the lower middle position of the spring body 1, a wavy corrugated elastic arm fixing plate 15 fixedly connected to one side of the elastic contact hole 4, a wavy corrugated elastic arm 3 installed on one side of the wavy corrugated elastic arm fixing plate 15, a U-shaped stress relief groove 10 at the bottom of the wavy corrugated elastic arm 3, a shape memory alloy wire 16 embedded inside the U-shaped stress relief groove 10, and a thermoelectric film 11 fixedly installed on the surface of the wavy corrugated elastic arm 3. The top of the spring sheet is fixedly connected to an elastic contact plate base plate 9. An inertial actuator bracket 17 is fixedly connected inside the elastic contact plate base plate 9. An inertial actuator 18 is installed in the middle of the inertial actuator bracket 17. An elastic contact sheet 7 is fixedly connected to the upper surface of the elastic contact plate base plate 9. An elastic contact sheet anti-detachment micro-tooth assembly 13 is provided on the top of the elastic contact sheet 7. A buffer pad 14 is installed on the surface of the elastic contact sheet anti-detachment micro-tooth assembly 13. An elastic clamping piece 5 is fixedly connected to the side of the spring sheet body 1 away from the through hole 2. A spring sheet body slot 6 is opened on the side of the spring sheet body 1 close to the elastic clamping piece 5. An elastic clamping piece tooth 8 is fixedly installed on the top of the elastic clamping piece 5.

[0021] Working principle: The screw hole contact spring 12 is engaged and pressed between the two panels of the housing by the elastic clamping plate 5. The elastic clamping plate teeth 8 on the top of the elastic clamping plate 5 are engaged and fixed with the two panels of the housing. The two through holes 2 on the spring body 1 are fitted onto the protruding fitting part of the housing. The spring body groove 6 on the spring body 1 is fitted onto the protruding fitting part of the housing. The elastic clamping plate 5, the through holes 2 and the spring body groove 6 cooperate with each other to ensure that the screw hole contact spring 12 is firmly fixed. To prevent the screw hole contact spring 12 from falling off, when the chassis vibrates, the vibration is transmitted to the buffer pad 14. The elastic contact piece anti-dislodgement micro-tooth assembly 13 then transmits the vibration to the elastic contact piece 7. The buffer pad 14 and the elastic contact piece 7 anti-dislodgement micro-tooth assembly 13 work together to provide initial shock absorption. The elastic contact piece 7 anti-dislodgement micro-tooth assembly 13 is engaged within the screw hole, preventing the elastic contact piece 7 from falling off or making poor contact due to vibration. A thermoelectric coating is also present on the surface of the elastic contact piece 7. When the temperature of the elastic contact piece 7 is too high, the thermoelectric film 11 actively contracts to enhance the locking force. When the vibration is transmitted to the bottom of the elastic contact piece 7, the inertial actuator 18 vibrates in the opposite direction. The reverse vibration is transmitted to the screw hole contact spring 12 through the inertial actuator bracket 17 to offset part of the vibration. Then the vibration is transmitted to the wavy pleated elastic arm 3. The wavy pleated structure of the wavy pleated elastic arm 3 and the angle of inclination relative to the spring body 1 provide secondary buffering and shock absorption for the vibration. The bottom of the wavy pleated elastic arm 3 has a U-shaped stress relief groove 10 to eliminate part of the stress. The shape memory alloy wire 16 embedded in the U-shaped stress relief groove 10 offsets the vibration. The U-shaped stress relief groove 10 and the shape memory alloy wire 16 work together to provide a third shock absorption effect. The wavy pleated elastic arm fixing plate 15 fixes the wavy pleated elastic arm 3 to prevent it from falling off.

[0022] In one aspect of this embodiment, there are two through holes 2, and the two through holes 2 are located on the left and right sides of the elastic contact plate hole 4, respectively, which serve to fix the screw hole contact spring 12. The elastic clamping plate 5 is generally arc-shaped, and the width of the clamping teeth 8 of the elastic clamping plate is the same as the width of the elastic clamping plate 5, which serves to clamp and fix the screw hole contact spring 12 and prevent it from falling off. The elastic clamping plate 5 and the through holes 2 cooperate with each other to ensure that the screw hole contact spring 12 is firmly fixed and to prevent the screw hole contact spring 12 from falling off.

[0023] In one aspect of this embodiment, the wavy pleated elastic arm 3 has a wavy shape and is inclined upward at a certain angle to the spring body 1, which plays a good role in shock absorption. There are six elastic contact pieces 7, and there are six elastic contact piece anti-detachment micro-tooth groups 13 and six buffer pads 14. The buffer pads 14 play a good role in buffering and protection, and the elastic contact piece anti-detachment micro-tooth groups 13 prevent the elastic contact pieces 7 from falling off or making poor contact.

[0024] In one aspect of this embodiment, the elastic contact piece 7 is petal-shaped, and there is a gap between each elastic contact piece 7. The elastic contact piece 7 ensures contact with the screw hole and avoids poor contact. The surface of the elastic contact piece 7 is covered with a silicone graphene composite coating with a thickness of 0.35mm, which realizes the dual functions of conductivity and shock absorption, and improves the operational stability of the equipment.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An improved structure for a screw hole contact spring, comprising a spring body (1), characterized in that: A through hole (2) is provided on one side of the spring body (1), and an elastic contact hole (4) is provided at the lower middle position of the spring body (1). A wavy corrugated elastic arm fixing plate (15) is fixedly connected to one side of the elastic contact hole (4). A wavy corrugated elastic arm (3) is installed on one side of the wavy corrugated elastic arm fixing plate (15). A U-shaped stress relief groove (10) is provided at the bottom of the wavy corrugated elastic arm (3). A shape memory alloy wire (16) is embedded inside the U-shaped stress relief groove (10). A thermoelectric film (11) is fixedly installed on the surface of the wavy corrugated elastic arm (3). An elastic contact bottom plate (9) is fixedly connected to the top of the wavy corrugated elastic arm (3). An inertial actuator bracket (17) is fixedly connected inside the base plate (9) of the contact plate. An inertial actuator (18) is installed in the middle of the inertial actuator bracket (17). An elastic contact plate (7) is fixedly connected to the upper surface of the elastic contact plate base plate (9). An elastic contact plate anti-detachment micro-tooth group (13) is provided on the top of the elastic contact plate (7). A buffer pad (14) is installed on the surface of the elastic contact plate anti-detachment micro-tooth group (13). An elastic clamping plate (5) is fixedly connected to the side of the spring plate body (1) away from the through hole (2). A spring plate body slot (6) is opened on the side of the spring plate body (1) close to the elastic clamping plate (5). An elastic clamping plate tooth (8) is fixedly installed on the top of the elastic clamping plate (5).

2. The improved structure of the screw hole contact spring according to claim 1, characterized in that: The number of through holes (2) is two, and the two through holes (2) are located on the left and right sides of the elastic contact plate hole (4), respectively.

3. The improved structure of the screw hole contact spring according to claim 1, characterized in that: The elastic clamping piece (5) is arc-shaped, and the width of the clamping teeth (8) of the elastic clamping piece is the same as the width of the elastic clamping piece (5).

4. The improved structure of the screw hole contact spring according to claim 1, characterized in that: The wavy pleated elastic arm (3) has a wavy shape and is inclined upward at a certain angle to the main body of the spring sheet (1).

5. The improved structure of the screw hole contact spring according to claim 1, characterized in that: The number of elastic contact pieces (7) is six, and the number of elastic contact piece anti-detachment micro-tooth group (13) and buffer pad (14) is six.

6. The improved structure of the screw hole contact spring according to claim 1, characterized in that: The elastic contact piece (7) is petal-shaped, and there is a gap between each elastic contact piece (7).

7. The improved structure of the screw hole contact spring according to claim 1, characterized in that: The surface of the elastic contact sheet (7) is provided with a silicone graphene composite coating, and the coating thickness is 0.35 mm.

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