Spring needle, circuit board and electric equipment

Abstract

The utility model relates to the technical field of electric connecting devices, in particular to a spring needle, a circuit board and electric equipment. The spring needle comprises a needle tube, a needle head and a spring used for driving the needle head to elastically move, the interior of the needle tube is hollow, one side of the needle tube is provided with an annular narrowing part extending towards the center line of the needle tube, the annular narrowing part is perpendicular to the extending direction of the needle tube, and the annular narrowing part defines a first through hole communicated with the inner space of the needle tube so that a needle body of the needle head can penetrate through the first through hole; specifically, the annular narrowing part is perpendicular to the extending direction of the needle tube, so that even if the seat body of the needle head abuts against the annular narrowing part, component force in the direction away from the center line of the needle tube cannot be applied to the annular narrowing part. Therefore, according to the spring needle, the annular narrowing part is not prone to deformation in the direction away from the center line of the needle tube due to long-term use, the first through hole is not prone to becoming larger along with the increase of the service time of the spring needle, and the service life of the spring needle can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection devices, in particular to a spring pin, a circuit board and an electrical equipment. Background Art

[0002] A spring pin, also called a pogo pin, is a component used to supply power to electronic products. It includes a needle tube (refer to a in Figure 1 ), a needle head (refer to b in Figure 1 ), and a spring (refer to c in Figure 1 ). During assembly, the spring and the needle head are sequentially inserted into the groove of the needle tube, and then the notch of the needle tube is pressurized, so that an arc-shaped folded edge portion (refer to d in Figure 1 ) is formed at the notch of the needle tube. The needle head includes a seat body (refer to e in Figure 1 ) and a needle body (refer to f in Figure 1 ). The contour of the seat body is larger than the through hole defined by the arc-shaped folded edge portion, so it is limited in the needle tube by the arc-shaped folded edge portion. The contour of the needle body is smaller than the through hole, so it can pass through the through hole.

[0003] The defect of the prior art is that when the seat body contacts the inner peripheral wall of the arc-shaped folded edge portion, a component force in the direction away from the center line of the needle tube will be applied to the inner peripheral wall of the arc, which is likely to cause the deformation of the arc-shaped folded edge portion after long-term use, and the gap between the through hole and the needle body may also become larger as the use time increases. Content of the Utility Model

[0004] The technical problem to be solved in the embodiment of the utility model is to provide a spring pin to solve the problem that the arc-shaped folded edge portion of the spring pin in the prior art is likely to be deformed after long-term use.

[0005] In a first aspect, the embodiment of the utility model provides a spring pin, which includes: a needle tube with a hollow interior, and a ring-shaped narrowing portion extending towards the center line of the needle tube is provided on one side of the needle tube. The ring-shaped narrowing portion is perpendicular to the extending direction of the needle tube, and the ring-shaped narrowing portion defines a first through hole communicating with the internal space of the needle tube; a needle head, which includes a seat body and a needle body installed on the seat body. The seat body is installed in the needle tube, and the contour of the seat body is larger than the first through hole. The needle body passes through the first through hole; a spring, which is installed in the needle tube and is located on the side of the seat body facing away from the first through hole.

[0006] Further, the other side of the needle tube gradually narrows in the direction away from the ring-shaped narrowing portion.

[0007] Further, it further includes a plug, which is installed on the other side of the needle tube.

[0008] Further, the surface of the seat body facing the spring is an inclined surface.

[0009] Further, a convex portion is provided on the outer side wall of the syringe tube, and the convex portion is located between the two ends of the syringe tube.

[0010] Further, the convex portion is an annular convex portion.

[0011] Further, the side of the needle body facing away from the spring is an arc-shaped drum surface.

[0012] Further, the syringe tube is a copper syringe tube, and the needle head is a copper needle head.

[0013] In a second aspect, an embodiment of the present invention further provides a circuit board, which includes a board main body and the spring needle shown in the first aspect above; welding holes are provided on the board main body, and the side of the spring needle away from the first through hole is inserted into the welding holes.

[0014] In a third aspect, an embodiment of the present invention further provides an electrical device, which includes the circuit board shown in the second aspect above.

[0015] Compared with the prior art, the beneficial effect of the spring needle provided by the embodiment of the present invention is as follows: The spring needle provided by the embodiment of the present invention includes a syringe tube, a needle head and a spring; the inside of the syringe tube is hollow, and one side of the syringe tube is provided with an annular narrowing portion extending towards the center line of the syringe tube. The annular narrowing portion is perpendicular to the extending direction of the syringe tube, and the annular narrowing portion defines a first through hole communicating with the internal space of the syringe tube; the needle head includes a seat body and a needle body installed on the seat body. The seat body is installed in the syringe tube, and the contour of the seat body is larger than the first through hole. The needle body passes through the first through hole, and the spring is installed in the syringe tube and is located on the side of the seat body facing away from the first through hole; specifically, since the annular narrowing portion is perpendicular to the extending direction of the syringe tube, even if the seat body abuts against the annular narrowing portion, no component force in the direction away from the center line of the syringe tube will be applied to the annular narrowing portion. Thus, it can be seen that by implementing the embodiment of the present invention, the annular narrowing portion is not easily deformed in the direction away from the center line of the syringe tube due to long-term use, and the first through hole is not easily enlarged as the use time of the spring needle increases, which is beneficial to improving the service life of the spring needle. Description of the Drawings

[0016] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the drawings. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a spring needle in the prior art;

[0018] Figure 2 is a three-dimensional schematic diagram of the spring needle shown in the embodiment of the present invention;

[0019] Figure 3 is Figure 2Schematic perspective view of the spring pin shown after omitting the needle tip;

[0020] Figure 4 is Figure 2 Cross-sectional view of the spring pin shown;

[0021] Figure 5 Process diagram of the production of the spring pin provided by the embodiment of the present utility model;

[0022] Figure 6 Cross-sectional view of the spring pin shown in another embodiment of the present utility model;

[0023] Figure 7 Exploded view of the spring pin provided by the embodiment of the present utility model and the board main body.

[0024] Each reference numeral in the figure is as follows:

[0025] 1000, circuit board;

[0026] 100, spring pin; 110, needle tube; 111, stepped through-hole; 1111, first through-hole; 1112, second through-hole; 112, annular constriction; 113, protruding portion; 120, needle tip; 121, seat body; 1211, inclined surface; 122, needle body; 1221, arc-shaped drum surface; 130, spring; 140, plug;

[0027] 200, board main body; 210, welding hole;

[0028] 9000, rotary cutter. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. Now, with reference to the accompanying drawings, the preferred embodiments of the present utility model will be described in detail.

[0030] The embodiment of the present utility model provides a spring pin 100. As Figures 1 - 5 shown, the spring pin 100 includes a needle tube 110, a needle tip 120 and a spring 130. The interior of the needle tube 110 is hollow. On one side of the needle tube 110, there is an annular constriction 112 extending towards the center line of the needle tube 110. The annular constriction 112 is perpendicular to the extending direction of the needle tube 110. The annular constriction 112 defines a first through-hole 1111 communicating with the internal space of the needle tube 110. The needle tip 120 includes a seat body 121 and a needle body 122 mounted on the seat body 121. The seat body 121 is mounted in the needle tube 110, and the contour of the seat body 121 is larger than the first through-hole 1111. The needle body 122 passes through the first through-hole 1111. The spring 130 is mounted in the needle tube 110 and is located on the side of the seat body 121 facing away from the first through-hole 1111.

[0031] By implementing this embodiment, the following beneficial effects can be obtained:

[0032] In the first aspect, the annular constriction portion 112 is perpendicular to the extending direction of the needle tube 110. Therefore, even if the seat body 121 abuts against the annular constriction portion 112, no component force in the direction away from the center line of the needle tube 110 will be exerted on the annular constriction portion 112. Thus, it can be seen that by implementing this embodiment, the annular constriction portion 112 is not easily deformed in the direction away from the center line of the needle tube 110 due to long-term use, and the first through hole 1111 is not easily enlarged as the usage time of the spring needle 100 increases, which is beneficial to improving the service life of the spring needle 100.

[0033] In the second aspect, since the arc-shaped flanging portion in the prior art is formed by pressing, the inner peripheral wall of the arc-shaped flanging portion is not a very smooth curved surface. This also causes that when the seat body 121 contacts the inner peripheral wall, the relatively protruding part of the inner peripheral wall will exert a component force perpendicular to the center line direction of the needle tube 110 on the seat body 121. At this time, the seat body 121 will shake, so the movement of the needle head 120 in the prior art is not smooth. In this embodiment, the annular constriction portion 112 is perpendicular to the extending direction of the needle tube 110. Therefore, when the seat body 121 contacts the annular constriction portion 112, the annular constriction portion 112 will not exert a component force perpendicular to the center line direction of the needle tube 110 on the seat body 121. Therefore, the needle head 120 will not shake like in the prior art during the telescopic process, and the movement of the needle head 120 is very smooth.

[0034] It is worth mentioning that in the prior art, the through hole defined by the arc-shaped flanging portion is formed by pressing. It is difficult to guarantee the accuracy of the through hole formed by pressing. If the preset aperture of the through hole is similar to the diameter of the needle body 122, the error caused by pressing easily makes the needle body 122 stuck in the through hole and unable to slide. Therefore, in the prior art, the preset aperture of the through hole is generally much larger than the diameter of the needle body 122, which also results in a large gap between the hole wall of the processed through hole and the needle body 122, and external pollutants are easily introduced into the interior of the needle tube 110 through the gap. The first through hole 1111 of the present utility model is formed by subtractive machining, rather than being formed by pressing like in the prior art. Therefore, the machining accuracy can be better guaranteed, the aperture of the first through hole 1111 can be closer to the diameter of the needle body 122, and the gap between the needle body 122 and the hole wall of the first through hole 1111 can be much smaller than that in the prior art, which is beneficial to preventing external pollutants from entering the interior of the needle tube 110 through the gap.

[0035] There are many ways of subtractive machining, such as laser cutting, tool cutting, electrical discharge machining, etc. This embodiment does not make a limitation here. Exemplarily, referring to Figure 5 , driving and driving Figure 5The rotary cutter 9000 with a small head and a large tail rotates, and then drives the rotary cutter 9000 to move towards the syringe 110, so that a stepped through hole 111 can be machined on the syringe 110 by the rotary cutter 9000. The first through hole 1111 is the hole section with a smaller aperture in the stepped through hole 111, and the hole section with a larger aperture in the stepped through hole 111 is called the second through hole 1112.

[0036] Reference Figure 2 、 Figure 7 In a specific embodiment, the other side of the syringe 110 gradually narrows in the direction away from the annular constriction 112.

[0037] Specifically, since the other side of the syringe 110 gradually narrows in the direction away from the annular constriction 112, the other side of the syringe 110 has a guiding effect, which can facilitate the installation of the syringe 110 at the welding hole 210 on the board body 200 of the circuit board 1000. Therefore, by implementing this embodiment, not only can the needle 120 and the spring 130 be prevented from detaching from the syringe 110, but also the syringe 110 can be easily installed at the welding hole 210, killing two birds with one stone.

[0038] It is worth mentioning that after the syringe 110 has a stepped through hole 111 by subtractive machining, applying a pressure towards the center line of the syringe 110 to the side of the syringe 110 away from the first through hole 1111 can cause the side of the syringe 110 away from the first through hole 1111 to gradually narrow.

[0039] Reference Figure 6 In another specific embodiment, the spring needle 100 further includes a plug 140. The plug 140 is installed on the other side of the syringe 110, and the plug 140 can also prevent the needle 120 and the spring 130 from detaching from the syringe 110 on the side of the syringe 110 away from the first through hole 1111. The plug 140 can be installed on the side of the syringe 110 away from the first through hole 1111 by means of adhesion, interference fit, welding, etc. As long as the side of the syringe 110 away from the first through hole 1111 can be blocked to prevent the needle 120 and the spring 130 from detaching from the syringe 110, this embodiment is not limited here.

[0040] Reference Figure 4 In some embodiments, the surface of the seat body 121 facing the spring 130 is an inclined surface 1211.

[0041] With this setting, the spring 130 can apply a lateral force to the seat body 121, enabling the seat body 121 to better contact the inner wall of the syringe 110. This can reduce the contact resistance, lower the heat generation, and improve the stability of the electrical connection.

[0042] Reference Figure 2, in some embodiments, a protrusion 113 is provided on the outer sidewall of the syringe barrel 110, and the protrusion 113 is located between the two ends of the syringe barrel 110.

[0043] Specifically, when the protrusion 113 is not provided, it is difficult to control the installation depth when the syringe barrel 110 is installed at the soldering hole 210. This will result in different installation depths of multiple spring pins 100 on the same circuit board 1000, and the consistency of multiple produced circuit boards 1000 will also be relatively poor. After the protrusion 113 is provided, the protrusion 113 can be stuck at the orifice of the soldering hole 210, so that the installation depth can be controlled. Multiple spring pins 100 on the same circuit board 1000 can have the same installation depth, and the consistency of multiple produced circuit boards 1000 will also be relatively good.

[0044] Reference Figure 2 , in a specific embodiment, the protrusion 113 is an annular protrusion, which can increase the support area when the protrusion 113 is stuck at the orifice of the soldering hole 210, and the structural strength of the protrusion 113 will also be greater.

[0045] Optionally, a plurality of protrusions 113 are provided, and the plurality of protrusions 113 are evenly distributed in the circumferential direction of the syringe barrel 110. Compared with a single protrusion 113, the plurality of protrusions 113 can increase the support area and share the force, so the syringe barrel 110 has higher structural strength.

[0046] Reference Figure 2 , in some embodiments, the side of the needle body 122 facing away from the spring 130 is an arc-shaped drum surface 1221.

[0047] First, by setting the side of the needle body 122 facing away from the spring 130 as the arc-shaped drum surface 1221, even if there is a certain alignment deviation between the spring pin 100 and the charging contact of the electrical device, good contact between the spring pin 100 and the charging contact can be ensured.

[0048] Second, the arc-shaped drum surface 1221 can reduce the wear on the contact surface caused by sharp edges, which is beneficial to extending the service life.

[0049] In some embodiments, the syringe barrel 110 is a copper syringe barrel, and the needle tip 120 is a copper needle tip.

[0050] First, copper is an excellent conductive material with a very low resistivity, which can provide good electrical conductivity.

[0051] Second, copper has good machinability and can be relatively easily cut, which is convenient for the processing of the syringe barrel 110.

[0052] Third, copper has good oxidation resistance, which can reduce the impact of oxidation on electrical connections.

[0053] An embodiment of the present utility model further provides a circuit board 1000, as Figure 7 shown. The circuit board 1000 includes a board body 200. There are welding holes 210 on the board body 200. The spring pin 100 is the spring pin 100 shown in the above embodiment. The side of the spring pin 100 away from the first through hole 1111 is inserted into the welding hole 210.

[0054] The beneficial effects of this embodiment have been described in detail in the embodiment of the above spring pin 100. Therefore, this embodiment will not be elaborated here.

[0055] An embodiment of the present utility model further provides an electrical device, as Figure 7 shown. The electrical device includes the circuit board 1000 shown in the above embodiment.

[0056] The beneficial effects of this embodiment have been described in detail in the embodiment of the above spring pin 100. Therefore, this embodiment will not be elaborated here.

[0057] It should be noted that there are many specific implementation manners of the electrical device, such as a mobile power rental cabinet, a watch charger, a headphone charging case, etc. This embodiment does not make any limitations here.

[0058] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A spring pin, characterized in that: include: A needle tube, which is hollow inside, and one side of the needle tube is provided with an annular narrowing portion extending toward the center line of the needle tube, the annular narrowing portion is perpendicular to the extension direction of the needle tube, and the annular narrowing portion defines a first through hole communicating with the inner space of the needle tube; A needle head, comprising a seat and a needle body mounted on the seat, wherein the seat is mounted in the needle tube, and the outline of the seat is larger than the first through hole, and the needle body is inserted into the first through hole; The spring is installed in the needle tube and is located on a side of the seat body facing away from the first through hole.

2. The spring pin according to claim 1, characterized in that: The other side of the needle tube gradually narrows in a direction away from the annular narrowing portion.

3. The spring pin according to claim 1, characterized in that: Also included is a plug which is mounted on the other side of the needle tube.

4. The spring pin according to any one of claims 1 to 3, characterized in that: A side of the seat body facing the spring is an inclined surface.

5. The spring pin according to any one of claims 1 to 3, characterized in that: A convex portion is provided on the outer side wall of the needle tube, and the convex portion is located between the two ends of the needle tube.

6. The spring pin according to claim 5, characterized in that: The protrusion is an annular protrusion.

7. The spring pin according to any one of claims 1 to 3, characterized in that: The side of the needle body facing away from the spring is an arc-shaped drum surface.

8. The spring pin according to any one of claims 1 to 3, characterized in that: The needle tube is a copper needle tube, and the needle head is a copper needle head.

9. A circuit board, characterized in that: include: a plate body, on which welding holes are provided; A spring pin, which is the spring pin according to any one of claims 1 to 8, wherein a side of the spring pin away from the first through hole is inserted into the welding hole.

10. An electrical device, characterized in that: The circuit board comprising the above-mentioned claim 9.

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