Rust-proof metal elastic sheet

Abstract

The utility model discloses a rust-proof metal elastic sheet, which comprises an elastic sheet body and a contact part, two sides of the elastic sheet body are provided with connecting frames, the upper side of the elastic sheet body is sleeved with a U-shaped frame, four sides of the U-shaped frame, which are far away from each other, are provided with positioning holes, limiting strips are inserted into the positioning holes, the upper ends of the limiting strips are fixedly connected with bending parts, and the bending parts are in contact with the U-shaped frame. The upper side of the U-shaped frame is in threaded connection with a pressing rod, the pressing rod corresponds to the contact part, the bottom end of the pressing rod is in glued connection with a base plate, the base plate is made of rubber materials and makes contact with the upper side of the contact part, and a clamping groove is formed in the U-shaped frame and makes contact with the supporting strip. According to the utility model, the U-shaped frame and the supporting strip are arranged on the contact part of the elastic sheet body, so that the elastic sheet body can be wrapped in cooperation with the limiting strip and the bending part, a stable structure of the contact part and the contact terminal on the PCB can be formed, the abrasion of a coating on the surface of the metal elastic sheet caused by friction can be reduced, and the corrosion can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of metal spring technology, specifically to a rust-proof metal spring. Background Technology

[0002] Metal springs, also known as dome switches, are usually made of stainless steel. Metal springs can be used for a long time in normal environments without being easily corroded. However, under certain specific environments, oxidation reactions can occur, resulting in poor performance of the metal springs.

[0003] Metal springs can corrode due to environmental factors during actual use. To prevent corrosion, a protective film structure is set on the metal spring body to prevent the protective film layer from breaking due to wear. However, the metal spring needs to be bent repeatedly during use, which causes it to come into contact with the terminals of the PCB circuit board, resulting in wear and affecting the anti-rust effect of the metal spring.

[0004] According to the Chinese patent publication CN203423104U, "Rust-proof Metal Spring", it is mainly described that through a simple structural design, it is easy to manufacture, not easy to deviate, and has a long service life. In addition, the surface of the metal spring is coated with an anti-rust coating, which has an effective anti-rust effect and further extends the service life. During the use of the metal spring, repeated bending will cause wear on the contact points of the metal spring, affecting the anti-rust effect of the metal spring.

[0005] Therefore, a rust-proof metal spring is proposed to solve the problem that repeated bending during the use of the metal spring will cause wear at the contact points, affecting the rust-proof effect of the metal spring. Utility Model Content

[0006] The technical problem to be solved by this utility model is that during the use of metal springs, repeated bending will cause wear on the contact points of the metal springs, affecting the rust prevention effect of the metal springs. Therefore, a rust-proof metal spring is proposed.

[0007] The technical solution adopted by this utility model to solve the technical problem is: a rust-proof metal spring sheet, including a spring sheet body and a contact part. A connecting frame is provided on both sides of the spring sheet body. A U-shaped frame is sleeved on the upper side of the spring sheet body. Positioning holes are opened on the four mutually distant sides of the U-shaped frame, and a limiting strip is inserted into the positioning hole. A bent part is fixedly connected to the upper end of the limiting strip. The bent part contacts the U-shaped frame. A support strip is fixedly connected to the bottom end of the limiting strip.

[0008] As a preferred technical solution of this utility model, a pressure rod is threadedly connected to the upper side of the U-shaped frame. The pressure rod corresponds to the contact part. By setting the pressure rod, the stress can be increased and the displacement caused by the contact part being pressed by external force can be reduced.

[0009] As a preferred technical solution of this utility model, a pad is glued to the bottom end of the pressure rod. The pad is made of rubber and contacts the upper side of the contact part. By setting the pad, the contact surface can be increased and the stability can be improved.

[0010] As a preferred technical solution of this utility model, a slot is provided in the U-shaped frame, and the slot contacts the support strip. By setting the slot, the support strip can be limited, thereby improving the stability of the connection between the U-shaped frame and the support strip.

[0011] As a preferred technical solution of this utility model, a contact strip is glued to the upper side of the support strip, and the contact strip is fixedly connected to the limiting strip. By setting the contact strip, friction can be reduced.

[0012] This utility model has the following advantages: by installing a U-shaped frame and support strip on the contact part of the spring body, it can form a wrapping of the spring body in conjunction with the limiting strip and the bending part, and make the contact part and the contact terminal on the PCB board have a stable structure, reducing the wear of the coating on the surface of the metal spring caused by friction, thereby reducing corrosion. Attached Figure Description

[0013] Figure 1 This is a side sectional view of a preferred embodiment of the present invention, showing the structure of a rust-proof metal spring.

[0014] Figure 2 This is a three-dimensional structural diagram of the U-shaped frame of a preferred embodiment of the present invention for an anti-rust metal spring sheet;

[0015] Figure 3 This is a three-dimensional structural diagram of the support strip of a rust-proof metal spring sheet according to a preferred embodiment of the present invention.

[0016] Explanation of reference numerals in the attached drawings: 1. Spring body; 2. Contact part; 3. Connecting frame; 4. U-shaped frame; 5. Positioning hole; 6. Limiting strip; 7. Bending part; 8. Support strip; 9. Pressure rod; 10. Pad; 11. Slot; 12. Contact strip. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Please refer to the following: Figure 1-3The rust-proof metal spring shown includes a spring body 1 and a contact part 2. The surface of the spring body 1 is coated with a protective film to reduce rust. Connecting frames 3 are provided on both sides of the spring body 1. A U-shaped frame 4 is sleeved on the upper side of the spring body 1. By setting the U-shaped frame 4 in conjunction with the support strip 8, the spring body 1 can be wrapped and the contact surface on the upper side of the spring body 1 can be increased to improve the pressing stability. Positioning holes 5 are opened on the four mutually spaced sides of the U-shaped frame 4, and a limiting strip 6 is inserted into the positioning hole 5. A bending part 7 is fixedly connected to the upper end of the limiting strip 6. The bending part 7 can be bent under external force, so that the support strip 8 is limited to the bottom side of the spring body 1. The bending part 7 contacts the U-shaped frame 4. The support strip 8 is fixedly connected to the bottom end of the limiting strip 6. A rubber strip contacts the upper side of the support strip 8 and the rubber strip is located inside the upper side of the U-shaped frame 4. Both sides of the rubber strip contact the limiting strip 6.

[0019] The contact part 2 corresponds to the pressure rod 9, which is threaded onto the upper side of the U-shaped frame 4. By setting the pressure rod 9, the position of the contact part 2 can be positioned, thereby avoiding displacement caused by external force pressing.

[0020] The upper side of the contact part 2 contacts the pad 10, which is glued to the bottom of the pressure rod 9. The pad 10 is made of rubber. By setting the pad 10, the contact area between the pressure rod 9 and the contact part 2 is increased, reducing wear while providing a certain force to the contact part 2, reducing the reaction speed of the contact part 2 when bending, thereby reducing the wear of the metal spring sheet surface during coating.

[0021] Among them, the support bar 8 contacts the slot 11, which is located on the four sides of the bottom of the U-shaped frame 4. By setting the slot 11, the wear between the limit bar 6 and the U-shaped frame 4 can be reduced through a stable connection structure, while maintaining the limiting effect on the spring body 1.

[0022] The limiting strip 6 is fixedly connected to the contact strip 12, which is made of rubber. The contact strip 12 is glued to the upper side of the support strip 8. By setting the contact strip 12, direct contact between the spring body 1, the U-shaped frame 4 and the limiting strip 6 can be avoided, thereby reducing wear and improving the rust prevention effect of the spring body 1.

[0023] Working principle: A U-shaped frame 4 is set at the contact part 2 of the spring body 1, which works with the support strip 8 to connect the contact part 2. Then, the pressure rod 9 works with the pad 10 to connect the recessed part of the contact part 2. The rubber sheet works with the pad 10 and the contact strip 12 to avoid direct contact between the spring body 1, the U-shaped frame 4 and the limiting strip 6, thus reducing wear. The metal spring formed in this way has the advantages of reducing friction and coating wear, and improving the rust prevention effect.

[0024] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0025] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rustproof metal spring sheet comprising a spring sheet body (1) and a contact portion (2), the spring sheet body (1) being provided with a link frame (3) on both sides, characterized in that, The elastic sheet body (1) is sleeved with a U-shaped frame (4) on the upper side, the four sides of the U-shaped frame (4) are provided with positioning holes (5) away from each other, the positioning holes (5) are inserted with limiting strips (6), the upper end of the limiting strip (6) is fixedly connected with a bending part (7), the bending part (7) is in contact with the U-shaped frame (4), and the bottom end of the limiting strip (6) is fixedly connected with a supporting strip (8).

2. The rustproof metal spring sheet according to claim 1, wherein The U-shaped frame (4) is threadedly connected with a pressing rod (9) on the upper side, and the pressing rod (9) corresponds to the contact part (2).

3. The rust-preventive sheet metal spring according to claim 2, wherein The bottom end of the pressing rod (9) is rubber-connected with a backing plate (10), the backing plate (10) is made of rubber material, and the backing plate (10) is in contact with the upper side of the contact part (2).

4. The rust-preventive sheet metal spring according to claim 2, wherein The U-shaped frame (4) is provided with a clamping groove (11) inside, and the clamping groove (11) is in contact with the supporting strip (8).

5. The rust-preventive sheet metal spring according to claim 4, wherein The upper side of the supporting strip (8) is rubber-connected with a contact strip (12), and the contact strip (12) is fixedly connected with the limiting strip (6).

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