Combined elastic sheet structure

Abstract

The utility model relates to the technical field of surface mounting, in particular to a combined type elastic sheet structure, which comprises a connecting piece and a circuit board clamped with the connecting piece, the connecting piece is provided with a plurality of side pressure type elastic sheets, the side ends of the elastic sheets are provided with welding sections, the connecting piece is provided with a positioning rod, and the circuit board is provided with a positioning groove and a welding area, the positioning rod corresponds to the positioning groove, and the welding section is connected with the welding area. According to the invention, a plurality of side pressure type elastic sheets are integrally arranged on the connecting piece, and the positioning rods are inserted into the positioning grooves, so that the connecting piece and the circuit board are positioned and clamped, and then the welding sections and the welding areas are attached by adopting SMT, so that the elastic sheets and the circuit board are fixedly welded, thereby avoiding center-of-gravity shift when a single elastic sheet is attached, and improving the product quality. Therefore, the elastic sheet is not easy to loosen or fall off after being laterally pressed and used for a long time, the uniform pressure of the contact surface of the elastic sheet and the circuit board is ensured, and the automatic mounting efficiency and accuracy of the elastic sheet are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to surface mount technology field especially relates to a combined spring structure. BACKGROUND

[0002] The spring is a kind of elastic metal element, is widely used in machinery, electronics, household, transportation and other fields, mainly for transmitting pressure, control movement, absorb vibration or provide electrical contact, and in practical application, the spring generally exists single form and is welded to circuit board by SMT.

[0003] However, the existing spring on the market is designed into asymmetric structure, for example, the elastic contact end of side is curve type or U-shaped structure (see Figure 1 ), when the spring structure is welded to circuit board, the gravity center is easy to deviate, so that the contact surface pressure of spring and circuit board is uneven, leading to mounting difficulty, slow efficiency, even loose or fall off after long time use. UTILITY MODEL CONTENTS

[0004] The utility model aims at: provide a combined spring structure, in view of the deficiency of prior art, aim at solving the technical problem of existing single side pressure type spring design into asymmetric structure, easy to deviate gravity center, leading to mounting and use difficult.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme: a combined spring structure, including connecting piece and the circuit board of connecting piece clasp, connecting piece is provided with multiple side pressure type spring, and the side end of spring is provided with welding section, and connecting piece is provided with positioning rod, and the circuit board is provided with positioning groove and welding area, wherein, positioning rod corresponds with positioning groove, and welding section is connected with welding area.

[0006] The utility model is further provided: spring is provided with two and is symmetrically distributed, so that two welding sections are left-right symmetrical.

[0007] The utility model is further provided: welding section includes first bending and second bending perpendicular to first bending, second bending is transversely arranged and placed below connecting piece, and second bending is attached to welding area.

[0008] The utility model is further provided: welding area is provided with two and is symmetrically arranged, so that second bending and welding area are attached up and down.

[0009] The utility model is further provided: welding area is the boss that circuit board top surface extends and sets up upwards.

[0010] The utility model is further provided: the area of welding area is greater than the area of second bending bottom surface.

[0011] The utility model further sets up: there is spacing between connecting piece and circuit board.

[0012] The utility model further sets up: positioning rod and positioning groove are all round or square.

[0013] The utility model further sets up: the bottom surface of connecting piece is provided with two recesses, and the welding section passes through the recess and extends to one side.

[0014] The utility model further sets up: connecting piece is made of plastic material, so that connecting piece and multiple elastic sheets are integrally formed by injection molding.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the utility model integrates multiple side pressure type elastic sheets on the connecting piece, inserts the positioning rod into the positioning groove, realizes the positioning clamping of the connecting piece and the circuit board, adopts SMT bonding through the welding section and the welding area, realizes the fixed welding of the elastic sheet and the circuit board, avoids the gravity deviation or the misalignment of single elastic sheet mounting, makes the elastic sheet not easy to loosen or fall off after long time side pressure use, guarantees the uniform contact surface pressure of the elastic sheet and the circuit board, and improves the automatic mounting efficiency and precision of the elastic sheet. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is the structure diagram of the elastic sheet in the prior art;

[0018] Figure 2 It is the perspective view of the overall structure of the utility model;

[0019] Figure 3 It is the cross-sectional view of the overall structure of the utility model;

[0020] Figure 4 It is the structure diagram of the connecting piece in the utility model;

[0021] Figure 5 It is the structure diagram of the circuit board in the utility model;

[0022] Figure 6 It is the structure diagram of the elastic sheet in the utility model.

[0023] The label details involved in the above drawings are as follows:

[0024] 1-Connector, 11-Positioning rod, 12-Groove;

[0025] 2-Circuit board, 21-Positioning groove, 22-Soldering area;

[0026] 3-Spring, 31-Welded section, 311-First bend, 312-Second bend, 32-Elastic lever arm;

[0027] 4- Spacing. Detailed Implementation

[0028] In the description of this application, the term "multiple" refers to two or more (including two). Technical terms such as "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary / secondary relationship of the indicated technical features. Terms such as "installation," "connection," and "linking" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In the description of this application, the technical terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0030] In order to better understand the above-mentioned objectives, technical solutions and advantages of this application, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings, and to understand in detail how to solve the problems raised in the background art.

[0031] like Figures 2 to 6 As shown, a combined spring sheet structure includes a connector 1 and a circuit board 2 that snaps into the connector 1. The connector 1 is provided with a plurality of side-pressing spring sheets 3. The side ends of the spring sheets 3 are provided with welding sections 31. The connector 1 is provided with a positioning rod 11. The circuit board 2 is provided with a positioning groove 21 and a welding area 22, wherein the positioning rod 11 corresponds to the positioning groove 21, and the welding section 31 is connected to the welding area 22.

[0032] Through the above scheme, in actual application, first, multiple side pressure type elastic sheets 3 are integrated on the connecting piece 1, the arrangement mode of the multiple elastic sheets 3 is side-by-side arrangement, then the positioning rod 11 is inserted into the positioning groove 21, the positioning and clamping of the connecting piece 1 and the circuit board 2 can be realized, at this time, the welding section 31 abuts against the welding area 22, the welding section 31 and the welding area 22 are attached by SMT process, the fixed welding of the elastic sheet 3 and the circuit board 2 can be realized, so as to avoid the unstable gravity center when the single side pressure type elastic sheet 3 is attached, and it is not easy to loosen or fall off after long time use, and the contact surface pressure of the elastic sheet 3 and the circuit board 2 is uniform, at the same time, multiple elastic sheets 3 can be attached at one time through the chip mounter, the automatic attachment efficiency and precision of the elastic sheet 3 are improved.

[0033] In addition, in the embodiment, the matching positioning rod 11 and the positioning groove 21 are arranged, referring to Figure 3 When the positioning rod 11 is inserted into the positioning groove 21, on the one hand, the gravity center deviation and attachment skew of the elastic sheet 3 can be prevented, on the other hand, when the elastic arm 32 of the elastic sheet 3 is pressed, the reverse force can be provided to avoid the pressure inclination, and the service life of the elastic sheet 3 is improved.

[0034] As shown in Figure 2 and Figure 3 , as an improved specific embodiment, the elastic sheet 3 is provided with two and symmetrically distributed, so that the two welding sections 31 are left-right symmetrical. Specifically, the two elastic sheets 3 are distributed side by side on the same straight line, so as to form a mirror image symmetrical structure of the two elastic sheets 3 on the connecting piece 1, so as to ensure the stability of the gravity center.

[0035] As shown in Figure 2 , Figure 3 and Figure 6As shown, as an improved embodiment, the welding section 31 includes a first bending 311 and a second bending 312 connected with the first bending 311 perpendicularly, the second bending 312 is arranged transversely and placed below the connecting piece 1, and the second bending 312 is attached to the welding area 22. Specifically, the elastic sheet 3 further includes a U-shaped elastic arm 32 and a connecting section integrally connected with the elastic arm 32, so as to form a side pressure structure, the welding section 31 is connected with the connecting section, the welding section 31 is arranged at the left end or the right end of the connecting section, that is, the welding section 31 is at the left side or the right side of the elastic arm 32, and the first bending 311 and the second bending 312 are an integral structure to ensure the structural strength, the first bending 311 extends in the vertical direction, at the same time, the second bending 312 of the left elastic sheet 3 extends outward to the left side wall of the connecting piece 1, and the second bending 312 of the right elastic sheet 3 extends outward to the right side wall of the connecting piece 1, so that the welding section 31 is placed between the connecting piece 1 and the circuit board 2, which can avoid the contact or friction between the connecting piece 1 and the circuit board 2, and the connecting piece 1 can also apply pressure to the welding section 31 to maintain good contact when attached to the circuit board 2, thereby improving the quality and efficiency of welding.

[0036] As shown in Figure 3 and Figure 5 As an improved embodiment, the welding area 22 is provided with two and symmetrically arranged, so that the second bending 312 is attached to the welding area 22 above and below. Specifically, based on the fact that the elastic sheet 3 is provided with two and symmetrically distributed left and right, the two welding areas 22 are symmetrically distributed on the same straight line on the circuit board 2, and the two welding areas 22 are on both sides of the positioning groove 21, and due to the insertion of the positioning rod 11 and the positioning groove 21, the second bending 312 can be just above the welding area 22, which can ensure the accurate positioning and contact area of welding.

[0037] As shown in Figure 3 and Figure 5 As an improved embodiment, the welding area 22 is a boss arranged upwardly on the top surface of the circuit board 2. Specifically, the welding area 22 is a rectangular boss, which can coat the solder paste on the welding area 22 during assembly, thereby accurately controlling the solder paste coating position, ensuring the stable connection of the elastic sheet 3 and the circuit board 2, and avoiding waste.

[0038] As shown in Figure 3 As an improved embodiment, the area of the welding area 22 is larger than the area of the bottom surface of the second bending 312. During assembly, it can ensure the welding area of the elastic sheet 3 and the circuit board 2, and at the same time, it can provide sufficient reserved area to avoid insufficient solder paste coating area leading to poor welding, and also prevent solder paste overflow.

[0039] As shown in Figure 3As shown, as an improved embodiment, the spacing 4 between the connecting piece 1 and the circuit board 2 can enable the preliminary pressure to be applied to the second bend 312 below the two ends of the connecting piece 1, facilitate the mounting, reduce the occurrence of poor or insecure welding, and at the same time, the spacing 4 can also enhance the heat dissipation effect of the circuit board 2.

[0040] As shown in Figure 4 and Figure 5 As shown, as an improved embodiment, the positioning rod 11 and the positioning groove 21 are circular or square. Specifically, the positioning rod 11 and the positioning groove 21 in the embodiment are preferably circular, and of course can be square according to requirements, so that the positioning rod 11 is a cylinder and the positioning groove 21 is a circular hole penetrating the circuit board 2. At the same time, the positioning rod 11 and the positioning groove 21 in the embodiment are both provided with two holes, which can be more firm and accurate in positioning, avoid the connecting piece 1 from being offset or loosened before the spring sheet 3 is mounted, and also can well solve the problem of the spring sheet 3 being mounted askew. Of course, the number and arrangement of the positioning rod 11 and the positioning groove 21 can be set according to actual requirements, such as side by side or staggered distribution, which is not specifically limited here.

[0041] As shown in Figure 3 and Figure 4 As shown, as an improved embodiment, the bottom surface of the connecting piece 1 is symmetrically provided with two grooves 12, and the welding section 31 penetrates the groove 12 and extends to one side. Specifically, the first bend 311 is accommodated in the groove 12 and extends downward, and the two second bends 312 extend to the left and right sides of the two grooves 12, respectively. The groove 12 can ensure the exposed area of the spring sheet 3 and adjust the weight of the connecting piece 1, so as to change the pressure applied to the welding section 31, avoid the tin paste from collapsing due to excessive pressure, and increase the risk of tin paste overflow.

[0042] As shown in Figure 2 and Figure 3 As shown, as an improved embodiment, the connecting piece 1 is made of plastic material, so that the connecting piece 1 and the plurality of spring sheets 3 are integrally formed by injection molding. Specifically, two spring sheets 3 are provided in the embodiment, so that the two spring sheets 3 are pre-fixed in the mold when the connecting piece 1 is injection molded, and the connecting piece 1 is injection molded to form an integral structure after cooling, so that the spring sheet 3 and the connecting piece 1 are combined firmly and seamlessly, and the overall structural strength is ensured.

[0043] It should be pointed out that: the above is only the preferred embodiments of the present application, the scope of protection of the present application is not limited to the above examples, all technical solutions under the idea of the present application belong to the protection scope of the present application. It should be noted that, for ordinary skilled in the art, without departing from the principles of the present application under the premise of a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A combined bullet structure, characterized by The utility model provides a connecting piece and circuit board, the connecting piece is provided with a plurality of side pressure type elastic sheet, the side end of elastic sheet is provided with welding section, the connecting piece is provided with positioning rod, the circuit board is provided with positioning groove and welding area, wherein, the positioning rod corresponds with positioning groove, welding section is connected with welding area.

2. The combined bullet structure according to claim 1, wherein The elastic sheet is provided with two and symmetric distribution, so that two welding section left and right symmetry.

3. The combined bullet structure of claim 2, wherein The welding section includes first bending and second bending which is connected with the first bending perpendicularly, the second bending is set laterally and is placed below the connecting piece, and the second bending is attached with the welding area.

4. The combined bullet structure of claim 3, wherein The welding area is provided with two and symmetric setting, so that the second bending and the welding area correspond and attach up and down.

5. The combined bullet structure of claim 4, wherein The welding area is the boss which is set up and extends upward on the top surface of the circuit board.

6. The combined bullet structure of claim 4, wherein The area of the welding area is greater than the area of the bottom surface of the second bending.

7. The combined bullet structure of claim 1, wherein There is a spacing between the connecting piece and the circuit board.

8. The combined bullet structure of claim 1, wherein The positioning rod and the positioning groove are circular or square.

9. The combined bullet structure of claim 1, wherein The bottom surface of the connecting piece is symmetrically provided with two grooves, the welding section passes through the groove and extends to one side.

10. The combined bullet structure of claim 9, wherein The connecting piece is made of plastic material, so that the connecting piece and the plurality of elastic sheets are integrally formed by injection molding.

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