Elastic sheet type American standard D-shaped ground copper pipe
By designing a spring-loaded American standard D-type grounding copper tube, and utilizing an arc-shaped clamping spring and an integrated connection structure, the problem of deformation of the American standard D-type grounding copper tube during grounding contact testing was solved, achieving higher clamping force and test pass rate.
Patent Information
- Application Number
- CN202520238850.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Existing US standard type D grounding copper tubing is prone to deformation during grounding contact testing under UL498-125 clause, resulting in reduced clamping force, increased risk of test failure, and inability to meet the qualification standard.
Design a spring-loaded American standard D-type copper tube, using an arc-shaped protrusion to hold the spring, avoiding the force point of the test fixture, and integrally connected with the metal tube body. It has grooves to increase elastic deformation capacity and adaptability, and the wiring clamp has grooves to improve friction.
It improves the clamping force of grounding protection, ensures grounding effect, increases the test pass rate of UL498-125 clause, and has a simple structure that is easy to promote and apply.
Smart Images
Figure CN223911868U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of American standard socket, specifically relates to a spring piece type American standard D type ground copper pipe applied to American standard socket. BACKGROUND
[0002] On the market, the American standard D type ground copper pipe used on most American standard socket products of NEMA 5-15R, 5-20R, 6-15R, 6-20R, 7-15R, 14-15R or 15-15R is of uniform straight body structure, and the inner wall is flat, when doing the "Grounding Contact Test" of UL498-125 clause, after being pried by a jig according to the test requirement in the clause, the wall body of the American standard D type ground copper pipe is easily deformed, thereby reducing the clamping force, increasing the risk of test failure, and finally leading to that the product cannot reach the qualified standard. SUMMARY
[0003] In view of the above problems, the utility model aims at providing a spring piece type American standard D type ground copper pipe with reasonable structure design, clamping function and good contact effect.
[0004] To achieve the above-mentioned purpose, the utility model provides a technical scheme:
[0005] A spring piece type American standard D type ground copper pipe, which comprises a metal pipe body, one end of the metal pipe body is closed and is provided with a wire clamp head, the other end is provided with a D type opening, and two clamping spring pieces are symmetrically arranged on the metal pipe body at the inner side position corresponding to the D type opening.
[0006] As a preferred scheme of the utility model, the clamping spring piece is in arc convex shape, which is beneficial to the plugging of the plug and the test jig, and also makes the clamping spring piece more evenly distribute pressure when stressed, thereby increasing the stability and reliability of clamping.
[0007] As a preferred scheme of the utility model, the distance between the highest point of the convex of the clamping spring piece and the D type opening is 5-6mm, which reasonably avoids the test force point of the test jig and ensures the clamping effect.
[0008] As a preferred scheme of the utility model, the clamping spring piece and the metal pipe body are in an integral connection structure, so that the connection between the clamping spring piece and the metal pipe body is more firm and not easy to be damaged.
[0009] As a preferred scheme of the utility model, grooves are arranged at the upper and lower edge positions corresponding to the clamping spring piece, so that the clamping spring piece is more easily elastically deformed when stressed, thereby increasing the flexibility and adaptability of clamping. In addition, the grooves can also reduce the weight of the entire ground copper pipe and reduce the cost.
[0010] As a preferred scheme of the utility model, the cross section of the wire clamp head is U-shaped, which can conveniently put in the wire core and then extrude and fix.
[0011] As a preferred scheme of the utility model, the inner wall of the wire clamp head is provided with a plurality of grooves. The friction between the wire clamp head and the wire core can be increased, and the firmness of the wiring can be improved.
[0012] As a preferred scheme of the utility model, the connecting part of the wire clamp head and the metal pipe body is provided with a hollow part. The weight of the whole ground copper pipe can be reduced, and the cost can be reduced.
[0013] The utility model has the advantages of reasonable structure design, two clamping springs, and the inside position of the D-shaped opening, which avoids the test force point of the jig, does not affect the spring, maintains good clamping force, ensures the effective contact of the ground terminal, guarantees the grounding protection, greatly improves the test qualified rate of UL498-125 clause, and simple overall structure, easy to realize, and wide application.
[0014] The utility model is further described below in combination with the drawings and examples. DRAWINGS
[0015] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.
[0016] Figure 2 It is the sectional structure schematic diagram of the utility model.
[0017] Figure 3 It is the side view structure schematic diagram of the utility model.
[0018] Figure 4 It is the structure schematic diagram of the utility model when testing. CONCRETE IMPLEMENTING METHOD
[0019] Example: refer to Figures 1 to 3 The utility model provides a spring piece type American D-shaped ground copper pipe, which comprises a metal pipe body 1. One end of the metal pipe body 1 is closed and is provided with a wire clamp head 2, the cross section of the wire clamp head 2 is preferably U-shaped, which can conveniently put in the wire core and then extrude and fix. Preferably, a plurality of grooves 21 are formed in the inner wall of the wire clamp head 2. The friction between the wire clamp head 2 and the wire core can be increased, and the firmness of the wiring can be improved. A hollow part 6 is arranged at the connecting part of the wire clamp head 2 and the metal pipe body 1. The weight of the whole ground copper pipe can be reduced, and the cost can be reduced.
[0020] The other end of the metal pipe body 1 is provided with a D-shaped opening 3, and two clamping elastic sheets 4 are symmetrically arranged on the metal pipe body 1 at the inner side position corresponding to the D-shaped opening 3. The cross section of the metal pipe body 1 is D-shaped, and the two clamping elastic sheets 4 are specifically located on the opposite vertical walls of the metal pipe body 1. The clamping elastic sheet 4 is preferably arc-shaped and convex, which is beneficial to the insertion and extraction of the plug and test fixture, and also makes the clamping elastic sheet 4 more evenly distribute the pressure when stressed, thereby increasing the stability and reliability of clamping. Preferably, the distance D between the highest point of the clamping elastic sheet 4 and the D-shaped opening 3 is 5-6 mm, which reasonably avoids the test force point of the test fixture and ensures the clamping effect. The clamping elastic sheet 4 and the metal pipe body 1 are preferably integrally connected, so that the connection between the clamping elastic sheet 4 and the metal pipe body 1 is more firm and not easy to be damaged. During production, the clamping elastic sheet 4 can be directly formed on the metal pipe body 1 by stamping and bending process. Preferably, a slot 5 is arranged at the upper and lower edge positions of the clamping elastic sheet 4, so that the clamping elastic sheet 4 is more easily elastically deformed when stressed, thereby increasing the flexibility and adaptability of clamping. In addition, the slot 5 can also reduce the weight of the entire copper pipe and reduce the cost.
[0021] Referring to Figure 4 When the test fixture 7 is inserted and prying tested, the contact point of the test fixture 7 is located in front of the clamping elastic sheet 4, although the clamping elastic sheet 4 at the upper position is pressed, it is not the test force point and is not affected much, and the clamping elastic sheet 4 at the lower position is not affected, effectively ensuring the clamping force, and greatly improving the test qualified rate of UL498-125 clause.
[0022] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also make changes and modifications to the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should also fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application. As described in the above embodiments of the present application, other copper pipe structures obtained by using the same or similar structures are also within the protection scope of the present application.
Claims
1. A pop can type DMT copper pipe according to the American standard, comprising a metal pipe body, characterized in that, One end of the metal pipe body is closed and provided with a wire clamp head, and the other end is provided with a D-shaped opening. Two clamping elastic sheets are symmetrically arranged on the inner side of the D-shaped opening.
2. The bullet type D-type copper pipe according to claim 1, wherein The clamping elastic sheet is in the shape of an arc-shaped protrusion.
3. The bullet type D-type copper pipe according to claim 2, wherein The distance between the highest point of the protrusion of the clamping elastic sheet and the D-shaped opening is 5-6 mm.
4. The bullet type D-type copper pipe according to claim 1, wherein The clamping elastic sheet and the metal pipe body are integrally connected.
5. The bullet type D-type copper pipe according to claim 1, wherein Grooves are arranged at the upper and lower edges of the clamping elastic sheet.
6. The bullet type D-type copper pipe according to claim 1, wherein The cross section of the wire clamp head is in the shape of U.
7. The R-134a D-type copper tube according to claim 6, wherein A plurality of grooves are arranged on the inner wall of the wire clamp head.
8. The D-type copper tube according to claim 1 or 6, wherein The connection between the wire clamp head and the metal pipe body is provided with a hollow part.