Injection Molded Assembly Test Probe and Its Production Method

Abstract

The present invention discloses an injection-molded assembly test probe and its production method, which includes a tube body. An upper needle body and a lower needle body are provided at both ends of the tube body. A flange is formed at one end of the tube body close to the upper needle body. A limiting ring is formed on the outer wall of the upper needle body. When the upper needle body is sleeved in the tube body, the limiting ring abuts against the flange. A first fastener and a second fastener made of insulating material are respectively arranged between the tube body and the upper needle body and the lower needle body. The first fastener is used to tightly fit the flange and the limiting ring along the axial direction of the tube body, and the second fastener is used to perform interference fit on the outer wall of the lower needle body at the port of the tube body along the radial direction of the tube body. This application blocks the interference of external noise on high-frequency signals and achieves excellent isolation performance. In addition, due to the use of injection molding, no solder joints are formed on the tube body, so that the impedance stability during signal transmission can be better guaranteed, the reflection loss is reduced, and the signal integrity is improved.

Description

Technical Field

[0001] The present invention relates to the field of test probes, and more particularly to an injection-molded assembled test probe and its production method. Background Art

[0002] In the semiconductor field, for RF, radar, high-speed processor CPU, graphics processor GPU, wireless communication modules, etc., high-frequency and high-speed chips need to be performance-tested after the packaging process, including SLT, ATE or collectively Final Test. High-frequency and high-speed tests have extremely high requirements for signal integrity and power integrity. The test probe mainly plays the role of connecting the test chip and the circuit board, and needs to provide support such as low loss, low standing wave, and stable signal transmission to realize the detection of the input and feedback signals, functions, electrical performance, power consumption, and other performance parameters of each module of the chip, and ensure the quality and reliability of the product.

[0003] Existing probes are basically composed of a needle tube and a needle head, which are connected by welding. However, the welding process will leave solder joints on the needle tube, which will reduce the impedance stability during signal transmission, increase the reflection loss and reduce the signal integrity. In addition, when the probe is installed in the test fixture, the outer wall of its needle tube needs to be completely insulated from the test fixture. The prior art usually coats an insulating material on the needle tube. However, after long-term use of the probe, the insulating material will slowly age, resulting in a weakened insulating effect and affecting the efficiency and stability of signal transmission. Summary of the Invention

[0004] To solve the above problems, the present invention provides an injection-molded assembled test probe, including a tube body. An upper needle body and a lower needle body are provided at both ends of the tube body. The upper needle body and the lower needle body are sleeved in the tube body. A spring is provided between the upper needle body and the lower needle body. A flange is formed at one end of the tube body close to the upper needle body. A limiting ring is formed on the outer wall of the upper needle body. When the upper needle body is sleeved in the tube body, the limiting ring abuts against the flange. Insulating first and second fasteners are respectively provided between the tube body and the upper and lower needle bodies. The first fastener is used to tightly fit the flange and the limiting ring along the axial direction of the tube body, and the second fastener is used to perform an interference fit on the outer wall of the lower needle body at the port of the tube body along the radial direction of the tube body.

[0005] Furthermore, the first fastener includes a first wrapping ring and a second wrapping ring that protrude inward. A first receiving groove is provided between the first wrapping ring and the second wrapping ring. A third wrapping ring is formed between the first receiving groove and the outer wall. When the first fastener is assembled between the upper needle body and the tube body, the first wrapping ring is tightly fitted on the outer wall of the tube body, the second wrapping ring is tightly fitted on the outer wall of the upper needle body, the flange and the limiting ring are tightly fitted and received in the first receiving groove, and the third wrapping ring covers the outer walls of the flange and the limiting ring.

[0006] Furthermore, the first wrapping ring, the second wrapping ring, and the third wrapping ring are concentrically arranged.

[0007] Furthermore, a first glue inlet groove and a second glue inlet groove are respectively provided in the first wrapping ring and the second wrapping ring. The first glue inlet groove and the second glue inlet groove are respectively perpendicular to the flange and the limiting ring. Glue inlet ports are provided at the ends of the first glue inlet groove and the second glue inlet groove.

[0008] Furthermore, the second fastener includes a fourth wrapping ring and a fifth wrapping ring. The fourth wrapping ring is tightly fitted on the outer wall of the tube body. The fifth wrapping ring is closely attached between the tube body and the lower needle body. A plurality of positioning rings protrude inwardly in the fourth wrapping ring. Positioning grooves matching the shapes of the positioning rings are provided on the outer wall of the tube body.

[0009] Furthermore, a plurality of third glue inlet grooves are provided on the fifth wrapping ring. The third glue inlet grooves are arranged along the axial direction of the tube body and one end of each of them is aligned with the joint of the tube body and the fourth wrapping ring.

[0010] Furthermore, the upper needle body includes an upper needle tip. When the limiting ring abuts against the flange, the upper needle tip protrudes outward from the tube body. The lower needle body includes a lower needle tip. When the second fastener tightly fits the port of the tube body on the outer wall of the lower needle body along the radial direction of the tube body, the lower needle tip protrudes outward from the tube body. A sleeve is provided on the side of the lower needle body away from the lower needle tip. One end of the spring is sleeved on the sleeve.

[0011] The present application also provides a production method for an injection-molded assembled test probe, and its steps include:

[0012] Step 1: Form a flange and a plurality of positioning grooves at both ends of a tube body with a preset length;

[0013] Step 2: After inserting the inner mold core into the tube body, insert the lower needle body towards the end of the tube body near the positioning groove, then place the tube body into a preset mold. Align the glue inlet tube with the glue inlet direction A on the outer wall of the tube body containing the positioning groove for glue injection. The glue flows along the outer wall of the tube body to form a fourth wrapping ring, embeds into the positioning groove to form a positioning ring. At the same time, the glue also flows along the side of the tube body towards the radial direction of the tube body to cover the joint of the tube body and the lower needle body to form a fifth wrapping ring, thus completing the injection molding of the second fastener.

[0014] Step 3: Insert a spring into the tube body so that one end of the spring is sleeved on the sleeve, then insert the upper needle body towards the end of the tube body near the flange, and make the limiting ring fit tightly on the flange.

[0015] Step 4: Then place the tube body into a preset mold, and align the glue inlet tube with the glue inlet directions B and C on the outer sides of the flange and the limiting ring along the outer wall of the tube body, the outer wall of the upper needle body, and the axial direction of the tube body for glue injection. The glue flows along the outer wall of the tube body to form a first wrapping ring, the glue flows along the outer wall of the upper needle body to form a second wrapping ring. At the same time, the glue covers the outer walls of the flange and the limiting ring to form a third wrapping ring, thus completing the injection molding of the second fastener.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In this embodiment, the first fastener and the second fastener made of insulating materials tightly fit the upper needle body and the lower needle body on the tube body. When the probe is inserted into the test device, the first fastener and the second fastener contact the device instead of the tube body, forming a metal shielding layer to block the interference of external noise on high-frequency signals and achieve excellent isolation performance.

[0018] In addition, since the first fastener and the second fastener are injection-molded with the tube body, no solder joints will be formed on the tube body, thus better ensuring the impedance stability during signal transmission, reducing reflection loss and improving signal integrity.

[0019] Finally, an air layer will be formed around the tube body, thus further optimizing the efficiency and stability of signal transmission, ensuring that the high-frequency characteristics are exerted to the best state. In summary, this design enables the high-frequency test equipment to complete signal tests with the least loss, the highest accuracy and stability during use, and is applicable to the fields of high-speed communication and high-frequency test requirements. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the injection-molded assembly test probe of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the first fastener of the injection-molded assembly test probe of the present invention;

[0023] Figure 3 It is a cross-sectional view of the first fastener of the injection-molded assembly test probe of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the second fastener of the injection-molded assembly test probe of the present invention;

[0025] Figure 5 It is a cross-sectional view of the second fastener of the injection-molded assembly test probe of the present invention;

[0026] Figure 6 It is a cross-sectional view of the overall structure of the injection-molded assembly test probe of the present invention;

[0027] Figure 7 It is a schematic diagram of the assembly structure of step one of the production method of the injection-molded assembly test probe of the present invention;

[0028] Figure 8 It is a schematic diagram of the assembly structure of step two of the production method of the injection-molded assembly test probe of the present invention;

[0029] Figure 9 It is a schematic diagram of the assembly structure of step three of the production method of the injection-molded assembly test probe of the present invention;

[0030] Figure 10 It is a schematic diagram of the assembly structure of step four of the production method of the injection-molded assembly test probe of the present invention;

[0031] The reference numerals and names in the figure are as follows:

[0032] Tube body 100, upper needle body 200, lower needle body 300, spring 400, flange 110, limit ring 210, first fastener 500, second fastener 600, first wrapping ring 510, second wrapping ring 520, first receiving groove 530, third wrapping ring 540, first glue inlet groove 511, second glue inlet groove 521, glue inlet 512, fourth wrapping ring 610, fifth wrapping ring 620, positioning ring 611, positioning groove 120, third glue inlet groove 621, upper needle tip 220, lower needle tip 310, sleeve 320. Detailed implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0034] A more detailed description of the present invention will be given. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself. In the description of the present invention, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning, so it cannot be understood as a limitation on the protection scope of the present invention. In the description of the embodiments of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0036] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention.

[0037] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0038] The preferred embodiments of the present invention will be further described in conjunction with the accompanying drawings. As Figure 1 shown, an injection-molded assembly test probe includes a tube body 100. The shape of the tube body 100 is a hollow cylinder. An upper needle body 200 and a lower needle body 300 are provided at both ends of the tube body 100. The upper needle body 200 and the lower needle body 300 are sleeved in the tube body 100. A spring 400 is provided between the upper needle body 200 and the lower needle body 300. A flange 110 is formed at one end of the tube body 100 close to the upper needle body 200. A limiting ring 210 is formed on the outer wall of the upper needle body 200. When the upper needle body 200 is sleeved in the tube body 100, the limiting ring 210 abuts against the flange 110. A first fastener 500 and a second fastener 600 made of insulating material are respectively provided between the tube body 100 and the upper needle body 200 and the lower needle body 300. The first fastener 500 is used to tightly fit the flange 110 and the limiting ring 210 along the axial direction of the tube body 100, and the second fastener 600 is used to tightly fit the port of the tube body 100 on the outer wall of the lower needle body 300 along the radial direction of the tube body 100.

[0039] In the assembly of this embodiment, first, the lower needle body 300 is sleeved in the tube body 100, and then the second fastener 600 is formed between the tube body 100 and the lower needle body 300 by using an injection molding process. The second fastener 600 can cause the port of the tube body 100 to deform in the radial direction of the tube body 100, so that the lower needle body 300 is clamped and fixed at one end of the tube body 100. Then, a spring 400 is inserted into the tube body 100 at the other end of the lower needle body 300. Then, the upper needle body 200 is sleeved in the tube body 100, so that the limiting ring 210 abuts against the flange 110, thereby closing both ends of the tube body 100. Finally, the first fastener 500 is formed between the tube body 100 and the upper needle body 200 by using an injection molding process. The first fastener 500 can tightly fit the flange 110 and the limiting ring 210 together along the axial direction of the tube body 100, thereby forming a fixation between the tube body 100 and the upper needle body 200.

[0040] This embodiment utilizes a first fastener 500 and a second fastener 600 made of insulating material to tightly fit the upper needle body 200 and the lower needle body 300 on the tube body 100. When the probe is inserted into the test device, the first fastener 500 and the second fastener 600 contact the device instead of the tube body 100, forming a metal shielding layer to block external noise from interfering with the high-frequency signal and achieve excellent isolation performance. In addition, since injection molding is used between the first fastener 500 and the second fastener 600 and the tube body 100, no solder joints are formed on the tube body 100, thereby better ensuring the impedance stability during signal transmission, reducing reflection loss and improving signal integrity. Finally, an air layer is formed around the tube body 100, thereby further optimizing the efficiency and stability of signal transmission and ensuring that the high-frequency characteristics are in the best state. In summary, this design enables high-frequency test equipment to complete signal testing with minimal loss, highest accuracy and stability during use, and is suitable for high-speed communication and high-frequency testing requirements.

[0041] On the basis of the above embodiment, Figure 2 、 Figure 3 and Figure 6 As shown, the first fastener 500 includes a first wrapping ring 510 and a second wrapping ring 520 protruding inward, a first accommodating groove 530 is provided between the first wrapping ring 510 and the second wrapping ring 520, and a third wrapping ring 540 is formed between the first accommodating groove 530 and the outer wall. When the first fastener 500 is assembled between the upper needle body 200 and the tube body 100, the first wrapping ring 510 is tightly fitted on the outer wall of the tube body 100, and the second wrapping ring 520 is tightly fitted on the outer wall of the upper needle body 200. The flange 110 and the limiting ring 210 are tightly fitted and accommodated in the first accommodating groove 530, and the third wrapping ring 540 covers the outer wall of the flange 110 and the limiting ring 210. In this way, the first accommodating groove 530 and the third wrapping ring 540 cooperate with each other to tightly fit the flange 110 and the limiting ring 210 together along the axial direction of the tube body 100.

[0042] On the basis of the above embodiment, Figure 2 、 Figure 3 and Figure 6 As shown, the first wrapping ring 510, the second wrapping ring 520 and the third wrapping ring 540 are concentrically arranged. In this way, when the first fastener 500 is assembled between the upper needle body 200 and the tube body 100, it can be ensured that the upper needle body 200 and the tube body 100 are concentrically arranged, so that this product has extremely high overall concentricity and will not get stuck on the test fixture due to probe deflection during disassembly and assembly.

[0043] On the basis of the above embodiment, Figure 2 、 Figure 3 andFigure 6 As shown, a first glue inlet groove 511 and a second glue inlet groove 521 are respectively arranged inside the first wrapping ring 510 and the second wrapping ring 520. The first glue inlet groove 511 and the second glue inlet groove 521 are respectively perpendicular to the flange 110 and the limiting ring 210. Glue inlets 512 are arranged at the ends of the first glue inlet groove 511 and the second glue inlet groove 521. When injection molding is required for the first fastener 500, the glue flows into the mold along the first glue inlet groove 511 and the second glue inlet groove 521, forming an impact on both sides of the flange 110 and the limiting ring 210 in the vertical direction, thereby achieving the effect of tightly fitting the flange 110 and the limiting ring 210 along the axial direction of the pipe body 100.

[0044] Furthermore, on the basis of the above-mentioned embodiment, in combination with Figures 4 to 6 As shown, the second fastener 600 includes a fourth wrapping ring 610 and a fifth wrapping ring 620. The fourth wrapping ring 610 is tightly fitted on the outer wall of the pipe body 100. The fifth wrapping ring 620 is closely attached between the pipe body 100 and the lower needle body 300. A plurality of positioning rings 611 are convexly arranged inside the fourth wrapping ring 610. A positioning groove 120 matching the shape of the positioning rings 611 is arranged on the outer wall of the pipe body 100. When the second fastener 600 is injection molded, the positioning rings 611 are formed in the positioning groove 120, thereby ensuring that the second fastener 600 can better contact the pipe body 100.

[0045] Furthermore, on the basis of the above-mentioned embodiment, in combination with Figures 4 to 6 As shown, a plurality of third glue inlet grooves 621 are arranged on the fifth wrapping ring 620. The third glue inlet grooves 621 are arranged along the axial direction of the pipe body 100 and one end of each of them is aligned with the joint of the pipe body 100 and the fourth wrapping ring 610. When injection molding is required, glue is injected from the third glue inlet grooves 621, thereby respectively forming the fourth wrapping ring 610 and the fifth wrapping ring 620.

[0046] Furthermore, on the basis of the above-mentioned embodiment, in combination with Figures 4 to 6 As shown, the upper needle body 200 includes an upper needle tip 220. When the limiting ring 210 abuts against the flange 110, the upper needle tip 220 extends outwards from the pipe body 100. The lower needle body 300 includes a lower needle tip 310. When the second fastener 600 tightly fits the port of the pipe body 100 on the outer wall of the lower needle body 300 along the radial direction of the pipe body 100, the lower needle tip 310 extends outwards from the pipe body 100. A sleeve 320 is arranged on the side of the lower needle body 300 away from the lower needle tip 310. One end of the spring 400 is sleeved on the sleeve 320, so that when the spring 400 is compressed, the compression direction of the spring 400 can be guided.

[0047] The present application also discloses a production method for the above-mentioned injection-molded assembly test probe, which includes:

[0048] Step 1: As Figure 7 shown, flanges 110 and a plurality of positioning grooves 120 are respectively formed at both ends of a tube body 100 with a preset length.

[0049] Step 2: As Figure 8 shown, after inserting an inner mold core into the tube body 100, insert a lower needle body 300 into one end of the tube body 100 close to the positioning groove 120, then sleeved the tube body 100 into a preset mold, align the glue inlet tube (not shown in the figure) with the glue inlet direction A of the outer wall of the tube body 100 containing the positioning groove 120 for injecting glue. The glue flows along the outer wall of the tube body 100 to form a fourth wrapping ring 610, embeds into the positioning groove 120 to form a positioning ring 611. At the same time, the glue also flows along the side surface of the tube body 100 to the radial direction of the tube body 100 to form a fifth wrapping ring 620 covering the joint of the tube body 100 and the lower needle body 300. Since in this process, the glue will generate pressure along the radial direction of the tube body 100 towards the port of the tube body 100, the fifth wrapping ring 620 will cause a slight deformation of the port of the tube body 100, so that its port has an interference fit on the outer wall of the lower needle body 300, thus completing the injection molding of the second fastener 600.

[0050] Step 3: As Figure 9 shown, insert a spring 400 into the tube body 100, so that one end of the spring 400 is sleeved on the sleeve 320, then insert an upper needle body 200 into one end of the tube body 100 close to the flange 110, so that the limiting ring 210 is tightly fitted on the flange 110.

[0051] Step 4: As Figure 10 shown, sleeved the tube body 100 into a preset mold again, align the glue inlet tube (not shown in the figure) with the glue inlet direction B of the outer wall of the tube body 100 and the glue inlet direction C of the outer wall of the upper needle body 200 and the outer side of the flange 110 and the limiting ring 210 along the axial direction of the tube body 100 for injecting glue. The glue flows along the outer wall of the tube body 100 to form a first wrapping ring 510, the glue flows along the outer wall of the upper needle body 200 to form a second wrapping ring 520. At the same time, the glue will cover on the outer walls of the flange 110 and the limiting ring 210 to form a third wrapping ring 540. Since the glue forms an impact in the vertical direction on both sides of the flange 110 and the limiting ring 210, an effect of tightly fitting the flange 110 and the limiting ring 210 along the axial direction of the tube body 100 is formed, thus completing the injection molding of the second fastener 600.

[0052] Details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. An injection-molded assembled test probe, characterized in that It includes a tube body (100), with an upper needle body (200) and a lower needle body (300) provided at both ends of the tube body (100). The upper needle body (200) and the lower needle body (300) are sleeved inside the tube body (100). A spring (400) is provided between the upper needle body (200) and the lower needle body (300). A flange (110) is formed at one end of the tube body (100) close to the upper needle body (200). A limiting ring (210) is formed on the outer wall of the upper needle body (200). When the upper needle body (200) is sleeved inside the tube body (100), the limiting ring (210) abuts against the flange (110). An insulating first fastener (500) and a second fastener (600) are respectively provided between the tube body (100) and the upper needle body (200) and the lower needle body (300). The first fastener (500) is used to tightly fit the flange (110) and the limiting ring (210) along the axial direction of the tube body (100). The second fastener (600) is used to make the port of the tube body (100) in interference fit with the outer wall of the lower needle body (300) along the radial direction of the tube body (100). The first fastener (500) includes a first wrapping ring (510) and a second wrapping ring (520) protruding inward. A first receiving groove (530) is provided between the first wrapping ring (510) and the second wrapping ring (520). A third wrapping ring (540) is formed between the first receiving groove (530) and the outer wall of the first fastener (500). When the first fastener (500) is assembled between the upper needle body (200) and the tube body (100), the first wrapping ring (510) is tightly fitted on the outer wall of the tube body (100), the second wrapping ring (520) is tightly fitted on the outer wall of the upper needle body (200), the flange (110) and the limiting ring (210) are tightly fitted and received in the first receiving groove (530), and the third wrapping ring (540) covers the outer walls of the flange (110) and the limiting ring (210).

2. The injection-molded assembly test probe according to claim 1, wherein The first wrapping ring (510), the second wrapping ring (520) and the third wrapping ring (540) are concentrically arranged.

3. The injection-molded assembly test probe according to claim 2, characterized in that, A first glue inlet groove (511) and a second glue inlet groove (521) are respectively provided inside the first wrapping ring (510) and the second wrapping ring (520). The first glue inlet groove (511) and the second glue inlet groove (521) are respectively perpendicular to the flange (110) and the limiting ring (210). Glue inlet ports (512) are provided at the ends of the first glue inlet groove (511) and the second glue inlet groove (521).

4. The injection-molded assembly test probe according to claim 1, wherein The second fastener (600) includes a fourth wrapping ring (610) and a fifth wrapping ring (620). The fourth wrapping ring (610) is tightly fitted on the outer wall of the pipe body (100), and the fifth wrapping ring (620) is closely attached between the pipe body (100) and the lower needle body (300). A plurality of positioning rings (611) are convexly provided inside the fourth wrapping ring (610), and positioning grooves (120) matching the shapes of the positioning rings (611) are provided on the outer wall of the pipe body (100).

5. The injection-molded assembly test probe according to claim 4, wherein, A plurality of third glue inlet grooves (621) are provided on the fifth wrapping ring (620). The third glue inlet grooves (621) are arranged along the axial direction of the pipe body (100), and one end of each of them is aligned with the joint of the pipe body (100) and the fourth wrapping ring (610).

6. The injection-molded assembly test probe according to claim 1, wherein, The upper needle body (200) includes an upper needle head (220). When the limit ring (210) abuts against the flange (110), the upper needle head (220) extends outwards from the pipe body (100). The lower needle body (300) includes a lower needle head (310). When the second fastener (600) tightly fits the port of the pipe body (100) on the outer wall of the lower needle body (300) along the radial direction of the pipe body (100), the lower needle head (310) extends outwards from the pipe body (100). A sleeve (320) is provided on the side of the lower needle body (300) away from the lower needle head (310), and one end of the spring (400) is sleeved on the sleeve (320).

7. A production method of an injection-molded assembled test probe, characterized in that: The steps include: Step 1: Form flanges (110) and a plurality of positioning grooves (120) at both ends of a pipe body (100) with a preset length; Step 2: After inserting an inner mold core into the pipe body (100), insert the lower needle body (300) into the pipe body (100) near the positioning groove (120). Then, sleeve the pipe body (100) into a preset mold, align the glue inlet pipe with the glue inlet direction A at one end of the pipe body (100) near the positioning groove (120) for injecting glue. The glue flows along the outer wall of the pipe body (100) to form the fourth wrapping ring (610), embeds into the positioning groove (120) to form the positioning ring (611). At the same time, the glue also flows along the side surface of the pipe body (100) to the radial direction of the pipe body (100) to cover the joint of the pipe body (100) and the lower needle body (300) to form the fifth wrapping ring (620), thereby completing the injection molding of the second fastener (600); Step 3: Insert a spring (400) into the pipe body (100) so that one end of the spring (400) is sleeved on the sleeve (320). Then, insert the upper needle body (200) into the pipe body (100) near the flange (110) so that the limit ring (210) is tightly fitted on the flange (110); Step 4: Then, insert the pipe body (100) into a preset mold, and inject glue along the outer wall of the pipe body (100), the outer wall of the upper needle body (200), and the glue injection directions B and C on the outer sides of the flange (110) and the limit ring (210) aligned with the axis of the pipe body (100). The glue flows along the outer wall of the pipe body (100) to form a first wrapping ring (510), the glue flows along the outer wall of the upper needle body (200) to form a second wrapping ring (520), and at the same time, the glue covers the outer walls of the flange (110) and the limit ring (210) to form a third wrapping ring (540), thereby completing the injection molding of the second fastener (600).

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