Elastic sheet

Abstract

The utility model discloses an elastic sheet, which comprises a bottom plate and an elastic arm, two sides of the bottom plate are respectively connected with a protective wall, and a partial area of the elastic arm is located between the two protective walls. The elastic arm comprises a first elastic bending part, a first elastic force arm, a second elastic bending part, a second elastic force arm, a third elastic bending part, a third elastic force arm, a contact part, a first simply-supported force arm, a fourth elastic bending part, a second simply-supported force arm and an abutting part which are connected in sequence, and the first elastic bending part is connected with one end of the bottom plate; the bottom plate, the first elastic force arm and the second elastic force arm form a [-shaped structure, the second elastic force arm and the third elastic force arm are arranged at an acute angle, the contact part protrudes out of the top surface of the protection wall, the first simple force arm and the second simple force arm are arranged at an obtuse angle, and the abutting part is arranged close to the bottom plate. The elastic sheet is novel in structure, small in occupied working space and large in elastic force.

Description

Technical Field

[0001] The utility model relates to the technical field of elastic contact pieces, in particular to a spring sheet. Background Art

[0002] Figure 1 A spring sheet of the prior art is shown, which includes a bottom plate, and protective walls 2 are provided on both sides of the bottom plate. One end of the bottom plate is connected to an elastic arm 3, and the elastic arm has a contact portion 37. In actual use, the inventor found that the elastic force provided by the spring sheet is relatively small. Figure 2 As shown by the dotted line in the figure, when the spring is subjected to a large pressure, its contact portion 37 will be displaced to a large extent in the negative direction of the X-axis. In severe cases, it may even exceed the protection area of ​​the protection wall 2 in the negative direction of the X-axis, which will undoubtedly occupy more space of the electronic equipment on which it is mounted. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a large elastic spring sheet with small occupied space.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a spring sheet, including a base plate and an elastic arm, the two sides of the base plate are respectively connected with protective walls, and a partial area of ​​the elastic arm is located between the two protective walls, the elastic arm includes a first elastic bending portion, a first elastic force arm, a second elastic bending portion, a second elastic force arm, a third elastic bending portion, a third elastic force arm, a contact portion, a first simply supported force arm, a fourth elastic bending portion, a second simply supported force arm and a resistance portion which are connected in sequence, the first elastic bending portion is connected to one end portion of the base plate, the base plate, the first elastic force arm and the second elastic force arm form a 匚-shaped structure, the second elastic force arm and the third elastic force arm are arranged at an acute angle, the contact portion protrudes from the top surface of the protective wall, the first simply supported force arm and the second simply supported force arm are arranged at an obtuse angle, and the resistance portion is arranged close to the base plate.

[0005] In one embodiment, the spring piece is a metal structural component.

[0006] In one embodiment, the bottom surface of the bottom plate is a welding surface.

[0007] In one embodiment, the second elastic arm is parallel to the bottom plate.

[0008] In one embodiment, the spring piece is an integral structure formed by integral processing.

[0009] In one embodiment, the entire area of ​​the first elastic force arm is located between the two protection walls.

[0010] In one embodiment, the entire area of ​​the second elastic force arm is located between the two protection walls.

[0011] In one embodiment, a lower region of the first simply supported force arm is located between the two protection walls.

[0012] In one embodiment, the entire area of ​​the second simply supported force arm is located between the two protection walls.

[0013] In one embodiment, the exposed surface of the contact portion has a contact protrusion.

[0014] The beneficial effects of the present utility model are as follows: the structure of the spring sheet is novel, and the second elastic force arm and the third elastic force arm form a folded structure in a square shape toward the X-axis, which can effectively reduce the sliding distance of the contact portion toward the negative direction of the X-axis after the spring sheet is pressed down, thereby reducing the working space occupied by the spring sheet, which is in line with the development trend of thinner and lighter portable electronic devices such as mobile phones; moreover, when the spring sheet is pressed down to a certain extent, the abutting portion will abut against the bottom plate, thereby providing support for the contact portion, thereby increasing the elastic force of the spring sheet; in addition, the simply supported foot formed by the first simply supported force arm, the fourth elastic bending portion and the second simply supported force arm is not only unique in shape, but also can provide stronger support for the contact portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the shrapnel in the prior art;

[0017] Figure 2 A schematic diagram showing the comparison of the spring piece before and after being subjected to force in the prior art;

[0018] Figure 3 The structure of the spring piece of the first embodiment of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 4 The structure of the spring piece of the first embodiment of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 5 It is a cross-sectional view of the spring piece in the uncompressed state of the first embodiment of the utility model;

[0021] Figure 6 This is a cross-sectional view of the spring sheet in the compressed state of the first embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] 1. Bottom plate;

[0024] 2. Protective wall;

[0025] 3. Elastic arm; 31. First elastic bending portion; 32. First elastic force arm; 33. Second elastic bending portion; 34. Second elastic force arm; 35. Third elastic bending portion; 36. Third elastic force arm; 37. Contact portion; 371. Contact protrusion; 38. First simply supported force arm; 39. Fourth elastic bending portion; 40. Second simply supported force arm; 41. Resistance portion. DETAILED DESCRIPTION

[0026] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0030] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] Please refer to Figures 3 to 6 , Embodiment 1 of the present utility model is: a spring piece that can be applied to portable electronic devices such as mobile phones and tablet computers.

[0034] The spring sheet includes a base plate 1 and an elastic arm 3, and the two sides of the base plate 1 are respectively connected to protective walls 2, and a partial area of ​​the elastic arm 3 is located between the two protective walls 2. The elastic arm 3 includes a first elastic bending portion 31, a first elastic force arm 32, a second elastic force arm 33, a second elastic force arm 34, a third elastic bending portion 35, a third elastic force arm 36, a contact portion 37, a first simply supported force arm 38, a fourth elastic bending portion 39, a second simply supported force arm 40 and a resistance portion 41 which are connected in sequence. The first elastic bending portion 31 is connected to one end of the base plate 1, and the base plate 1, the first elastic force arm 32 and the second elastic force arm 34 form a "匚"-shaped structure. The second elastic force arm 34 is arranged at an acute angle to the third elastic force arm 36, and the contact portion 37 is arranged to protrude from the top surface of the protective wall 2, the first simply supported force arm 38 and the second simply supported force arm 40 are arranged at an obtuse angle, and the resistance portion 41 is arranged close to the base plate 1.

[0035] Specifically, when the spring sheet is under pressure, the base plate 1 is perpendicular to the first elastic force arm 32, the first elastic force arm 32 is perpendicular to the second elastic force arm 34, and the second elastic force arm 34 is parallel to the base plate 1 and is located directly above the base plate 1. That is to say, the first elastic bending portion 31 and the second elastic bending portion 33 are respectively a quarter-arc structure; the third elastic bending portion 35 is an arc structure with an arc less than half of π; the fourth elastic bending portion 39 is an arc structure with an arc greater than half of π and less than π.

[0036] In other embodiments, the spring piece may be a plastic structural part, while in this embodiment, the spring piece is a metal structural part, the bottom surface of the base plate 1 is a welding surface, and the surface of the second elastic force arm 34 away from the base plate 1 can be used as an absorption surface of the SMT process, that is, the spring piece of this embodiment can be welded and connected with external electronic devices using a surface mounting process.

[0037] For the convenience of the structural manufacturing of the elastic piece, it is preferred that the elastic piece is an integrally formed one-piece structure. Since the elastic piece in this embodiment is made of metal, the elastic piece in this embodiment can be an integrally formed structural member made by processes such as cutting and bending a metal sheet.

[0038] To enable the elastic piece to achieve good contact conduction with external devices to be conducted, optionally, the exposed surface of the contact portion 37 has contact protrusions 371. In this embodiment, the contact protrusions 371 are convex hulls formed by stamping.

[0039] To fully protect the elastic arms 3, all regions of the first elastic force arm 32 are located between the two protection walls 2; all regions of the second elastic force arm 34 are located between the two protection walls 2; the lower region of the first simple support force arm 38 is located between the two protection walls 2; all regions of the second simple support force arm 40 are located between the two protection walls 2.

[0040] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A shrapnel, characterized in that: It includes a bottom plate and elastic arms. Protective walls are respectively connected to both sides of the bottom plate. Part of the area of the elastic arms is located between the two protective walls. The elastic arms include a first elastic bending part, a first elastic force arm, a second elastic bending part, a second elastic force arm, a third elastic bending part, a third elastic force arm, a contact part, a first simply supported force arm, a fourth elastic bending part, a second simply supported force arm and a抵触 part that are connected in sequence. The first elastic bending part is connected to one end of the bottom plate. The bottom plate, the first elastic force arm and the second elastic force arm form a C-shaped structure. The second elastic force arm and the third elastic force arm are arranged at an acute angle. The contact part protrudes from the top surface of the protective wall. The first simply supported force arm and the second simply supported force arm are arranged at an obtuse angle. The抵触 part is close to the bottom plate.

2. The shrapnel according to claim 1, characterized in that: The shrapnel is a metal structural part.

3. The shrapnel according to claim 2, characterized in that: The bottom surface of the bottom plate is a welding surface.

4. The shrapnel according to claim 3, characterized in that: The second elastic force arm is parallel to the bottom plate.

5. The shrapnel according to claim 1, characterized in that: The shrapnel is an integrally formed one-piece structure.

6. The shrapnel according to claim 1, characterized in that: All areas of the first elastic force arm are located between the two protective walls.

7. The shrapnel according to claim 1, characterized in that: All areas of the second elastic force arm are located between the two protective walls.

8. The shrapnel according to claim 1, characterized in that: The lower area of the first simply supported force arm is located between the two protective walls.

9. The shrapnel according to claim 1, characterized in that: All areas of the second simply supported force arm are located between the two protective walls.

10. The spring piece according to claim 1, characterized in that: The exposed surface of the contact part has contact protrusions.

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