CN209692014U - Spring probe - Google Patents

Abstract

The utility model discloses a kind of spring probes, including needle tubing, tail end is stuck in the syringe needle that can be moved axially in needle tubing and along needle tubing and the spring for being arranged in needle tip and needle tubing between bottom and applying to syringe needle thrust, the opening end ring of needle tubing is circumferentially with multiple flexible elastic pieces, the first flange for preventing syringe needle and needle tubing to be detached from is equipped on the inside of elastic piece, under the action of the elastic force of elastic piece, first flange is pressed on the outer wall of syringe needle, the outer wall of syringe needle tail end is equipped with the second flange, under the action of the spring, second flange can be pushed against on the first flange.The spring probe impedance of the utility model is small, syringe needle and needle tubing stabilization in electrical contact, is suitble to the transmission of high frequency high current signal, and easy to assembly, is conducive to improve packaging efficiency.

Description

Spring probe

Technical field

The utility model relates to accurate interconnection technique field, in particular to a kind of spring probe.

Background technique

Spring probe, also known as Pogo Pin are that one kind by three syringe needle, needle tubing and spring basic element of character passes through precision The spring probe formed after equipment riveting, the tail end of syringe needle is inserted into needle tubing, under the action of spring thrust, syringe needle energy It is enough to be axially moved along needle tubing.Spring probe is a very fine probe, and volume can accomplish very small, is commonly applied to hand Accurate connection in the electronic products such as machine, communication, automobile, medical treatment, aerospace.Spring probe connects in circuit, plays biography The effect of power transmission signal.In order to make to keep stable during electric signal transmission, it is desirable that must be remained between needle tubing and syringe needle Electrical contact, otherwise electric signal transmission impedance increases, and results even in the interruption of signal.

In order to move axially so syringe needle, clearance fit between syringe needle and the inner wall of needle tubing.In order to make syringe needle and needle tubing It is kept in contact, in the prior art, the tail end of syringe needle is usually bevel structure, and when spring is against on inclined-plane, spring is to syringe needle Thrust there is the component for deviateing syringe needle axial direction, make in spring probe work, syringe needle is contacted with needle interior wall, allows electric signal master It to be transmitted by syringe needle and needle tubing, to ensure the stabilization and Low ESR of spring probe.Drawback of the prior art is that when encounter compared with When significantly shaking, syringe needle and needle tubing occur disconnecting phenomenon, cause the interruption of signal.With the application of 5G technology, to spring More stringent requirements are proposed for probe, it is desirable that spring probe Low ESR and high stability.

Utility model content

One aspect according to the present utility model provides a kind of spring probe, is stuck in needle tubing including hollow needle tubing, tail end It is interior and can along needle tubing move axially syringe needle and be arranged in the front end and needle tubing of syringe needle between bottom and to syringe needle apply The spring of thrust, the opening end ring of needle tubing are circumferentially with multiple flexible elastic pieces, and the inside of elastic piece, which is equipped with, prevents needle First flange of head and needle tubing disengaging, under the action of the elastic force caused by elastic piece flexible deformation, the first flange is pressed on The outer wall of the outer wall of syringe needle, syringe needle tail end is equipped with the second flange, and under the action of the spring, it is convex that the second flange can be pushed against first On edge.The beneficial effect is that: syringe needle is constrained using claw structure, can prevent syringe needle from deviating from from needle tubing；Claw has elasticity, Keep syringe needle easy to assembly with needle tubing, motorization assembly easy to accomplish；Needle tubing is close with needle contact, though communication equipment substantially When the concussion or shaking of degree, the elastic force of elastic piece also exists always, and the first flange and syringe needle are still able to maintain close contact, especially It is suitble in the communication equipment of high frequency high current.

In some embodiments, the outer wall interference engagement of the first flange and syringe needle.The first flange is set to be pressed on syringe needle Outer wall realizes good electrical contact.

In some embodiments, in the state that elastic piece is undeformed, the first flange perpendicular to needle tubing central axis Respectively decide what is right and what is wrong face inner edge it is arc-shaped, and inner edge diameter be less than syringe needle outer wall outer diameter.The inner edge diameter of first flange is less than syringe needle Outer wall outer diameter, it can be achieved that the first flange and syringe needle outer wall interference engagement.First flange generates small change in compaction process Shape holds the outer wall of syringe needle tightly.

In some embodiments, in the state that elastic piece is undeformed, elastic piece perpendicular to each of needle tubing central axis It decides what is right and what is wrong the inner edge in face and outer rim is convexly curved.

In some embodiments, open end radially cut open circular cross-section, open end molds multiple notches, notch Open end is divided into multiple elastic pieces.Elastic piece direct machine-shaping, elastic piece on circular needle tubing are integrated with needle tubing Structure, this molding elastic piece of mode are convexly curved perpendicular to the inner edge in the face of respectively deciding what is right and what is wrong of needle tubing central axis and outer rim.

In some embodiments, the material of elastic piece is beryllium copper.Not only electric conductivity is good for beryllium copper, but also hardness is high and has There is excellent elasticity.

In some embodiments, the quantity of elastic piece is no less than 4.Elastic piece directly opens up in the open end of needle tubing scarce Mouth molding, therefore the arc-shaped shape of elastic piece, in order to enable elastic piece to generate radially outer deformation, the width of elastic piece cannot Too big, i.e., the quantity of elastic piece cannot be very little.

In some embodiments, the rear end of the first flange has towards the first inclined-plane inside needle tubing, the second flange Front end has the second inclined-plane towards needle tip.When the second flange is when pushing against on the first flange, the first inclined-plane and second is tiltedly Face contact between face conducts realization between needle tubing and syringe needle, reduces the risk of poor contact.

In some embodiments, the angle of the central axis of the first inclined-plane and needle tubing is ɑ, and the range of ɑ is 35-55 °, second The angle of the central axis of inclined-plane and syringe needle is β, and the range of β is 35-55 °.

In some embodiments, the third inclined-plane towards syringe needle tail end, the first flange are equipped with close to needle tip position Front edge be equipped with the first fillet, the first flange is between third inclined-plane and the second flange.It is opposite in a few thing height In smaller application scenarios, under the thrust of spring, the first flange is against on third inclined-plane, due to the front end edge of the first flange Edge is equipped with the first fillet, and the distance that the first fillet can be small along third inclined-plane upward sliding keeps third inclined-plane convex by first The internal diameter of edge slightly supports greatly, and correspondingly, certain flexible deformation occurs for elastic piece, and the elastic force that elastic piece deformation generates is further Ground is pressed on the first flange on third inclined-plane, and make between the first flange and third inclined-plane or syringe needle in electrical contact more steps up It is close.

In some embodiments, the angle of the central axis of third inclined-plane and needle tubing is γ, and the range of γ is 35-55 °.

In some embodiments, syringe needle be equipped with blind hole, spring is extend into blind hole and the end of spring be pushed against it is blind The bottom in hole.Blind hole can guarantee that spring can axially stretch with stabilizing spring.

In some embodiments, needle tubing includes sleeve and plug, and one end of sleeve is equipped with elastic piece, the other end and plug Clamping.

In some embodiments, the outer wall of plug is equipped with fin, and the inner wall of sleeve is equipped with groove, and the front end of plug is protruded into In to sleeve and fin clamping in a groove.Specific embodiment of the present utility model uses the side of fin and groove male-female engagement It is mechanical continuous between formula realization sleeve and plug, and only need a small amount of magnitude of interference to guarantee sleeve and block up between sleeve and plug Head it is in electrical contact.

In some embodiments, the tail end of needle tubing is equipped with along the bar that needle tubing is axial and extends far from open end.It is inciting somebody to action When spring probe is connected on pcb board, bar and pcb board can be welded to connect.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of specific embodiment of spring probe provided by the utility model；

Fig. 2 is a kind of cross-sectional view of specific embodiment of spring probe provided by the utility model；

A kind of needle tubing of specific embodiment of Fig. 3 spring probe provided by the utility model and syringe needle clamping structure Partial sectional view；

Fig. 4 is a kind of specific embodiment of spring probe provided by the utility model when needle tubing and syringe needle are not clamped A kind of status diagram；

A kind of specific embodiment of Fig. 5 spring probe provided by the utility model is during needle tubing and syringe needle are clamped A kind of status diagram；

Fig. 6 is a kind of structural schematic diagram of specific embodiment of needle tubing provided by the utility model；

Fig. 7 is a kind of partial cutaway view of the open end 4 of specific embodiment of needle tubing provided by the utility model；

Fig. 8 is a kind of structural schematic diagram of specific embodiment of syringe needle provided by the utility model；

Fig. 9 is a kind of diagrammatic cross-section of specific embodiment of syringe needle provided by the utility model；

Figure 10 is the sectional view of another specific embodiment of needle tubing provided by the utility model；

Figure 11 is the partial enlarged view of the sectional view of another specific embodiment of needle tubing provided by the utility model；

Figure 12 be needle tubing provided by the utility model elastic piece under undeformed state at the first flange perpendicular to needle The structural schematic diagram in the face of deciding what is right and what is wrong of the central axis of pipe；

Structure when Figure 13 is the first flange provided by specific embodiment of the present utility model and third contact of incline plane Schematic diagram.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

Specific embodiment of the present utility model for ease of description, before definition syringe needle 2 is relative to needle tubing 1,1 phase of needle tubing After being for syringe needle 2.

With reference to Fig. 1-3, Fig. 1 is a kind of structural representation of specific embodiment of spring probe provided by the utility model Figure；Fig. 2 is a kind of specific embodiment of spring probe provided by the utility model along the cross-sectional view of central axis；Fig. 3 sheet A kind of needle tubing 1 of specific embodiment of spring probe provided by utility model and the partial sectional view of 2 clamping structure of syringe needle.

As one or more specific embodiments, spring probe includes hollow needle tubing 1, syringe needle 2 and spring 3, needle First 2 tail end is stuck in needle tubing 1 and syringe needle 2 can be moved axially along needle tubing 1, and the setting of spring 3 is in 2 front end of syringe needle and needle tubing 1 Apply thrust between bottom and to syringe needle 2,4 ring of open end of needle tubing 1 is circumferentially with multiple flexible elastic pieces 5, elasticity The inside of piece 5 is equipped with the first flange 7 for preventing syringe needle 2 and needle tubing 1 to be detached from, and under the action of the elastic force of elastic piece 5, first is convex Edge 7 is pressed on the outer wall of syringe needle 2, and the outer wall of the tail end of syringe needle 2 is equipped with the second flange 8, under the action of spring 3, the second flange 8 It can be pushed against on the first flange 7.

In some specific embodiments, needle tubing 1 is preferably the closed hollow circular tube of the open at one end and other end.Spring 3 one end is against the interior bottom of needle tubing 1, and the other end is against on syringe needle 2.The front end of syringe needle 2 reaches outside needle tubing 1, when syringe needle 2 by It is sufficiently large that syringe needle 2 can overcome the thrust of spring 3 and move into needle tubing 1 when axially pressing power, when removing pressing force, bullet Spring 3 extrapolates syringe needle 2 to needle tubing 1.Elastic piece 5 is located at open end 4 and axially extending along needle tubing 1, between multiple elastic pieces 5 between Every setting.Multiple elastic pieces 5 are annularly disposed in open end 4, and the inside of elastic piece 5, multiple elastic pieces are arranged in the first flange 7 5 and multiple first flanges 7 formed and be similar to claw structure, the tail end of syringe needle 2 is extend into claw, under the promotion of spring 3, the Two flanges 8 can be against on the first flange 7, can prevent syringe needle 2 from deviating from from needle tubing 1.

In some specific embodiments of the utility model, elastic piece 5 is remained along the radially outer of needle tubing 1 Flexible deformation.First flange 7 is pressed on the outer wall of syringe needle 2, i.e. the first flange by elastic force caused by the flexible deformation of elastic piece 5 7 remain close contact with syringe needle 2, make to remain between needle tubing 1 and syringe needle 2 and conduct.

In some specific embodiments of the utility model, in order to make the first flange 7 be pressed on the outer wall of syringe needle 2, the The outer wall interference engagement of one flange 7 and syringe needle 2.The root of elastic piece 5 is fixed, when the outer wall interference of the first flange 7 and syringe needle 2 is matched When conjunction, elastic piece 5 can be made to generate along the radially outer deformation of needle tubing 1.

Please refer to Figure 12, Figure 12 be under 5 undeformed state of elastic piece at the first flange 7 perpendicular to the central axis of needle tubing 1 It decides what is right and what is wrong the structural schematic diagram in face.For the ease of statement, it is interior for defining close to the orientation of 1 central axis of needle tubing, far from 1 central axis of needle tubing Orientation be outer.In some specific embodiments of the utility model, in the state that elastic piece 5 is undeformed, the first flange 7 The face inner edge of respectively deciding what is right and what is wrong perpendicular to 1 central axis of needle tubing it is arc-shaped, and the diameter of inner edge is less than the outer wall outer diameter of syringe needle 2, makes the The outer wall interference engagement of one flange 7 and syringe needle 2.2 shape of syringe needle is that both ends are thick, intermediate thin, thus the first flange 7 perpendicular to needle The diameter of the inner edge in the face of respectively deciding what is right and what is wrong of 1 central axis of pipe is less than the outer wall outer diameter of 2 middle section of syringe needle.Due in the first flange 7 Edge is arc-shaped, and the outer wall of syringe needle 2 is cylindrical, when the inside of the first flange 7 is contacted with 2 outer wall of syringe needle, in 5 elasticity of elastic piece Under the action of power, the first flange 7 also will form micro flexible deformation and generate a certain amount of elastic force, and elastic force direction substantially edge It is radial, the component of the elastic force makes the first flange 7 hold the outer wall of needle tubing 2 tightly, further makes the first flange 7 and syringe needle 2 close Contact.Meanwhile the elastic force of elastic piece 5 is bigger, then the Light deformation amount of the first flange 7 is bigger, correspondingly, the first flange 7 and needle The contact point of first 2 outer wall is more, while contacting even closer, the stability being electrically connected and drop between raising needle tubing 1 and syringe needle 2 Low impedance.In some embodiments, appropriate increase amount of interference, i.e. increase syringe needle 2 be can according to need in the art Outer wall outer diameter and the first flange 7 inner edge diameter difference, the deflection of Lai Tigao elastic piece 5, and then make the first flange 7 more Closely contacted with syringe needle 2.

It is generated since the flexible deformation of elastic piece 5 is the interference engagement between 2 outer wall of the first flange 7 and syringe needle, because This is for spring probe provided by specific embodiment of the present utility model, even if occurring significantly shaking or shaking, bullet Property piece 5 elastic force also exist always, the first flange 7 is still able to maintain close contact with syringe needle 2.Under normal circumstances, elastic piece 5 Size it is small, relative to the thrust of spring 3, first flange 7 as caused by the elastic force of elastic piece 5 to the pressure of syringe needle 2 also not It is enough to prevent spring 3 that syringe needle 2 is pushed to move.Therefore, even if multiple first flanges 7 encircle 2 outer wall of syringe needle, spring 3 is nor affected on Syringe needle 2 is pushed to be axially moved.

Specific embodiment of the present utility model provides the generation type of a kind of elastic piece 5 and the first flange 7, in advance in needle The inner wall of the open end 4 of pipe 1 forms collar flange, then be machined into equipment the open end of needle tubing 14 mold it is multiple along Open end 4 is divided into multiple elastic pieces 5 by the axially extending notch 6 of needle tubing 1, notch 6.Since open end 4 is cylindrical, therefore this Inner edge and outer rim of the kind molding elastic piece 5 of mode under undeformed state perpendicular to the face of respectively deciding what is right and what is wrong of 1 central axis of needle tubing are in outer Convex arc.

Needle tubing 1 is made of metal material, therefore elastic piece 5 can generate elasticity in the external force by certain limit Deformation.The elastic force size of elastic piece 5 and the material of elastic piece 5, the first flange 7 and 2 amount of interference of syringe needle, the height of elastic piece 5, The factors such as the thickness of the width of elastic piece 5 and elastic piece 5 are related.Those skilled in that art can be according to the present utility model Technical thought is tested by limited times, selects suitable above-mentioned parameter.

In some specific embodiments of the utility model, the material of elastic piece 5 is beryllium copper, and not only electric conductivity is good for beryllium copper It is good, and hardness is high and has excellent elasticity.In other specific embodiments of the utility model, the material of elastic piece 5 Material is stainless steel, and the advantages of stainless steel material is that elasticity is good, but its electric conductivity is slightly poor.

In some embodiments, elastic piece 5 directly opens up notch molding, therefore elastic piece 5 in the open end of needle tubing 14 Arc-shaped shape, in order to enable elastic piece 5 to generate radially outer deformation, the width of elastic piece 5 cannot be too big, i.e. elastic piece 5 Quantity cannot be very little.The quantity of elastic piece 5 is related with the diameter of needle tubing 1, and the diameter of needle tubing 1 is bigger, then needs more bullets Property piece 5.Preferably, the quantity of elastic piece 5 is no less than 4.

With reference to Fig. 6-9, Fig. 6 is a kind of structural schematic diagram of specific embodiment of needle tubing 1 provided by the utility model； Fig. 7 is a kind of partial cutaway view of the open end 4 of specific embodiment of needle tubing 1 provided by the utility model；Fig. 8 is this reality With a kind of structural schematic diagram of specific embodiment of novel provided syringe needle 2；Fig. 9 is syringe needle provided by the utility model A kind of diagrammatic cross-section of 2 specific embodiment.

In conjunction with Fig. 3, Fig. 6-8, it is preferable that the rear end of the first flange 7 has towards the first inclined-plane 9 inside needle tubing 1, and second The front end of flange 8 has the second inclined-plane 10 towards 2 front end of syringe needle.When the second flange 8 is on the first flange 7 of abutting, first Inclined-plane 9 is contacted with the second inclined-plane 10, is able to achieve between syringe needle 2 and needle tubing 1 and is conducted.Preferably, the first inclined-plane 9 and needle tubing 1 The angle of central axis is ɑ, and the range of ɑ is 35-55 °.Preferably, the value of ɑ is 40-50 °.It is highly preferred that the value of ɑ is 45 °.Second The angle of the central axis of inclined-plane 10 and syringe needle 2 is β, and the range of β is 35-55 °.Preferably, the value of β is 40-50 °.It is highly preferred that The value of β is 45 °.

With reference to Fig. 7-8, it is preferable that close to 2 front position of syringe needle be equipped with the third inclined-plane 19 towards 2 tail end of syringe needle, first The front edge of flange 7 is equipped with the first fillet 17, and the first flange 7 is located between third inclined-plane 19 and the second flange 8.Third inclined-plane 19 and the angle of the central axis of needle tubing 1 are γ, and the range of γ is 35-55 °.It is highly preferred that angle is 40-50 °.It is highly preferred that Angle is 45 °.When syringe needle 2 stretches, the first flange 7 can be on 2 outer wall of syringe needle between third inclined-plane 19 and the second flange 8 It is mobile.Third inclined-plane 19 defines the stroke that syringe needle 2 is shunk.Figure 13 is please referred to, Figure 13 is the specific embodiment party of the utility model Diagrammatic cross-section when first flange 1 provided by formula is contacted with third inclined-plane 19.In the relatively small application of a few thing height In scene, under the thrust of spring 3, the first flange 7 is against on third inclined-plane 19, due to the front edge of the first flange 7 Equipped with the first fillet 17, the first fillet 17 can slide small distance along third inclined-plane 19, make third inclined-plane 19 by first The internal diameter of flange 7 slightly supports greatly, and correspondingly, elastic piece 5 generates flexible deformation, and the elastic force that the deformation of elastic piece 5 generates is further Ground is pressed on the first flange 7 on third inclined-plane 19, to make the electrical property between the first flange 7 and third inclined-plane 19 or syringe needle 2 It contacts even closer.

As one or more specific embodiments, with reference to Fig. 8-9, the outer edge of 2 tail end of syringe needle is equipped with the second fillet 18.First fillet 17 and the second fillet 18 can make 2 tail end of syringe needle smoothly enter needle tubing 1.

In conjunction with Fig. 2 and Fig. 9, it is preferable that syringe needle 2 is equipped with blind hole 11, and spring 3 is extend into blind hole 11 and the end of spring 3 Portion is pushed against the bottom of blind hole 11.Blind hole 11 extends along the axial of syringe needle 2 to the front end of syringe needle 2 from the tail end of syringe needle 2.Blind hole 11 can guarantee that spring 3 can axially stretch with stabilizing spring 3.

With reference to Figure 10 and Figure 11, Figure 10 is cuing open for another specific embodiment of needle tubing 1 provided by the utility model Face figure.Figure 11 is the enlarged drawing of the sectional view of another specific embodiment of needle tubing 1 provided by the utility model.It is preferred that Ground, needle tubing 1 include sleeve 12 and plug 13, and one end of sleeve 12 is equipped with elastic piece 5, and the other end and plug 13 are clamped.Specifically, The outer wall of plug 13 is equipped with fin 14, and the inner wall of sleeve 12 is equipped with groove 15, and the front end of plug 13 extend into sleeve 12 and convex Rib 14 is clamped in groove 15.Preferably, fin 14 and groove 15 are all annular in shape.Sleeve 12 is the round tube or circle of open at both ends Cylinder, plug 13 is by the wherein closed at one end of sleeve 12.Needle tubing 1 uses sectional design, that is, is divided into sleeve 12 and plug 13 two Point, which can reduce requirement of the needle tubing 1 to process equipment.For example, in sectional design, sleeve 12 and plug 13 are with four Axis CNC process equipment can complete processing, and unitary design usually requires the higher five axis CNC process equipment of cost and completes to add Work, therefore sectional design reduces the investment of process equipment.For the ease of molding, in some embodiments, elasticity Piece 5 is formed by directly processing notch 6 in the open end of needle tubing 14, therefore elastic piece 5 is integrated with needle tubing 1, that is to say, that Elastic piece 5 and needle tubing 1 use material of the same race.In some embodiments, in order to make elastic piece 5 obtain good elasticity, Material using beryllium copper as production elastic piece 5, but beryllium copper price is relatively high.In 1 sectional design of needle tubing, sleeve 12 Using it is elastic preferably but the higher beryllium copper of price, plug 13 can using good conductivity but the relatively low conductive material of price such as Brass etc. reduces material cost compared to unitary design.In order to guarantee that electric current can be transmitted to sleeve 12 from plug 13, block up First 13 outer wall and the inner wall of sleeve 12 are interference fitted, and are in close contact sleeve 12 and plug 13.In no fin 14 and recessed In the case where slot 15, in order to securely fix sleeve and plug, need using biggish magnitude of interference.Using bigger magnitude of interference Defect is, since magnitude of interference is too big, plug is easy to support the internal diameter of sleeve greatly, causes sleeve that cannot combine closely with plug, It causes the impedance between sleeve and plug to expand, results even in sleeve and fall off with plug.In the specific implementation of the utility model In mode, mechanical connection is mainly realized by the male-female engagement of fin 14 and groove 15, and is only needed between sleeve 12 and plug 13 A small amount of magnitude of interference is to guarantee good electrical contact between sleeve 12 and plug 13.

As one or more specific embodiments, with reference to Fig. 6, the tail end of needle tubing 1 has bar 16, and bar 16 is along needle tubing 1 Axial and separate open end 4 extends.When spring probe to be connected on pcb board, bar 16 and pcb board can be welded to connect.

With reference to Fig. 4-5, Fig. 4 be spring probe provided by the utility model a kind of specific embodiment needle tubing 1 with A kind of status diagram when syringe needle 2 is not clamped；A kind of specific embodiment of Fig. 5 spring probe provided by the utility model In one of needle tubing 1 and 2 clamping process of syringe needle status diagram.

By in syringe needle 2 and 1 connection procedure of needle tubing, keep syringe needle 2 and needle tubing 1 coaxial, and make 2 tail end of syringe needle relatively to 1 internal motion of needle tubing, during the motion, the second flange 8, which can apply pressure to the first flange 7, makes elastic piece 5 towards open end 4 Surrounding flexible deformation, cause claw to be expanded.After the second flange 8 crosses the first flange 7, claw is shunk, and the first flange 7 compresses Second flange 8 is pushed against the inside of the first flange 7 by 2 outer wall of needle tubing, the thrust of spring 3.The thrust of spring 3 is insufficient to allow elasticity Piece 5 occurs large deformation and syringe needle 2 is caused to be detached from needle tubing 1.Spring probe machinery easy to accomplish provided in the present embodiment Makeup is matched, and the huge product of packaging efficiency yield this for spring probe is even more important.

Above-described is only some embodiments of the utility model.For those of ordinary skill in the art, Without departing from the concept of the present invention, various modifications and improvements can be made, these belong to practical Novel protection scope.

Claims (15)

1. spring probe, which is characterized in that be stuck in the needle tubing (1) including hollow needle tubing (1), tail end and can be along described The syringe needle (2) and be arranged between the front end and the needle tubing (1) interior bottom of the syringe needle (2) simultaneously that needle tubing (1) moves axially The syringe needle (2) are applied with the spring (3) of thrust, open end (4) ring of the needle tubing (1) is circumferentially with multiple flexible Elastic piece (5), the elastic piece (5) of stating are structure as a whole with the needle tubing (1), the elastic piece (5) along needle tubing (1) axis To extension, the inside of the elastic piece (5) is equipped with the first flange (7) for preventing the syringe needle (2) and needle tubing (1) to be detached from, in institute Under the action of stating elastic force caused by elastic piece (5) flexible deformation, first flange (7) is pressed on the syringe needle (2) The outer wall of outer wall, syringe needle (2) tail end is equipped with the second flange (8), under the action of the spring (3), second flange (8) it can be pushed against on first flange (7).

2. spring probe according to claim 1, which is characterized in that first flange (7) is outer with the syringe needle (2) Wall interference engagement.

3. spring probe according to claim 1, which is characterized in that in the state that the elastic piece (5) is undeformed, institute The inner edge for stating the face of respectively deciding what is right and what is wrong perpendicular to needle tubing (1) central axis of the first flange (7) is arc-shaped, and inner edge diameter is less than the needle The outer wall outer diameter of head (2).

4. spring probe according to claim 1, which is characterized in that in the state that the elastic piece (5) is undeformed, institute The inner edge and outer rim for stating the face of respectively deciding what is right and what is wrong perpendicular to needle tubing (1) central axis of elastic piece (5) are convexly curved.

5. spring probe according to claim 1, which is characterized in that the face of deciding what is right and what is wrong of the open end (4) radially is in circle Shape, the open end (4) mold multiple notches (6), and open end (4) are divided into multiple elastic pieces (5) by the notch (6).

6. spring probe according to claim 1, which is characterized in that the material of the elastic piece (5) is beryllium copper or stainless Steel.

7. spring probe according to claim 1, which is characterized in that the quantity of the elastic piece (5) is no less than 4.

8. spring probe according to claim 1, which is characterized in that the rear end of first flange (7) has towards needle (1) internal first inclined-plane (9) is managed, the front end of the second flange (8) has the second inclined-plane (10) towards syringe needle (2) front end.

9. spring probe according to claim 8, which is characterized in that the central axis of first inclined-plane (9) and needle tubing (1) Angle be ɑ, the range of ɑ is 35-55 °, and the angle of the central axis of second inclined-plane (10) and syringe needle (2) is β, the range of β It is 35-55 °.

10. spring probe according to claim 1, which is characterized in that close to the syringe needle (2) front position be equipped with towards The front edge on the third inclined-plane (19) of syringe needle (2) tail end, first flange (7) is equipped with the first fillet (17), described First flange (7) is between the third inclined-plane (19) and the second flange (8).

11. spring probe according to claim 10, which is characterized in that in the third inclined-plane (19) and syringe needle (2) The angle of mandrel is γ, and the range of γ is 35-55 °.

12. spring probe according to claim 1, which is characterized in that the syringe needle (2) is equipped with blind hole (11), described Spring (3) is extend into the blind hole (11) and the end of spring (3) is pushed against the bottom of the blind hole (11).

13. spring probe according to claim 1, which is characterized in that the needle tubing (1) includes sleeve (12) and plug (13), one end of the sleeve (12) is equipped with the elastic piece (5), and the other end and the plug (13) are clamped.

14. spring probe according to claim 13, which is characterized in that the outer wall of the plug (13) is equipped with fin (14), the inner wall of the sleeve (12) is equipped with groove (15), the front end of the plug (13) extend into the sleeve (12) and The fin (14) is clamped in the groove (15).

15. -14 described in any item spring probes according to claim 1, which is characterized in that the tail end of the needle tubing (1) is equipped with Along the bar (16) that the needle tubing (1) is axial and extends far from the open end (4).