Plastic part terminal needle withdrawing detector

Abstract

The utility model discloses a plastic part terminal pin withdrawing detector which comprises a supporting seat and an air valve assembly, and further comprises the air valve assembly which is fixed on the side wall of the supporting seat and comprises a pressure regulating valve and a pressure gauge. The air cylinder assembly comprises an air cylinder horizontally installed on the rear section of the top of the supporting base and a telescopic block coaxially connected with an air cylinder piston rod, and at least two ejector pins are installed on the front end face of the telescopic block; the terminal positioning assembly comprises a T-shaped fixing seat which is detachably installed on the front section of the top of the supporting seat, a protruding block which protrudes upwards is arranged in the middle of the T-shaped fixing seat, L-shaped notches are symmetrically formed in the two sides of the protruding block, and two vertical plates are embedded into the L-shaped notches respectively and are locked and fixed to the protruding block through positioning bolts; limiting grooves are formed in the opposite side walls of the two vertical plates, a plastic part terminal containing cavity is formed between the two limiting grooves, a containing groove is formed in the top of the protruding block, and a microswitch is embedded in the containing groove. According to the utility model, the problem of poor terminal clamping can be accurately detected, the operation efficiency is improved, the application range is wide, and the safety protection is perfect.

Description

Technical Field

[0001] This utility model relates to the field of plastic part terminal detection technology, specifically to a plastic part terminal pin retraction detector. Background Technology

[0002] Plastic terminals are industrial connectors used to achieve electrical connections, with their outer shell made of insulating plastic. In the field of electronic connector manufacturing, a reliable connection between the plastic terminal and the wire is crucial to ensuring electrical performance. In traditional manufacturing processes, after the wire is inserted into the terminal inside the plastic shell, insufficient insertion depth or terminal deformation often leads to a loose connection. If a mating terminal with pins is then inserted into the other end of the plastic terminal, the original terminal is prone to detaching from the plastic shell, causing serious quality problems such as poor contact and signal transmission interruption.

[0003] Existing technologies for detecting terminal connection quality have the following technical shortcomings:

[0004] I. Limitations of testing methods: Traditional visual inspection or manual sampling cannot accurately determine the reliability of terminal connection, and lacks simulated testing conditions for pin movement.

[0005] 2. Lack of pressure control: Some pressure detection devices use constant pressure testing, which cannot simulate the dynamic pressure changes during the actual insertion process, resulting in deviations between the test results and the actual working conditions.

[0006] 3. Insufficient positioning accuracy: The positioning structure of the testing fixture is simple and difficult to adapt to plastic terminal parts of different sizes. During the testing process, the tested part is prone to displacement, which affects the accuracy of the test.

[0007] IV. Low level of automation: Existing equipment relies heavily on manual operation, resulting in low detection efficiency and poor operational consistency. Utility Model Content

[0008] In order to overcome at least one of the technical problems existing in the prior art, this utility model provides a plastic part terminal pin retraction detector, which can accurately detect terminal misalignment problems, improve operating efficiency, have a wide range of applications, and provide comprehensive safety protection.

[0009] A plastic part terminal pin retraction detector includes a support base and a valve assembly. The top of the support base is a mounting plane. The valve assembly is fixed to the side wall of the support base and includes a pressure regulating valve and a pressure gauge. The pressure regulating valve is connected to an external air source through a first air pipe and communicates with a cylinder through a second air pipe.

[0010] Cylinder assembly: includes a cylinder horizontally mounted on the rear top of the support base, and a telescopic block coaxially connected to the cylinder piston rod, wherein at least two ejector pins are mounted on the front end face of the telescopic block;

[0011] Terminal positioning assembly: includes a T-shaped fixing seat that can be detachably installed on the front of the top of the support base. The T-shaped fixing seat has an upward protrusion in the middle. L-shaped notches are symmetrically opened on both sides of the protrusion. Two upright plates are respectively embedded in the L-shaped notches and locked to the protrusion by positioning bolts. The top of the upright plate is higher than the top surface of the protrusion.

[0012] Limiting grooves are formed on the opposing sidewalls of the two upright plates, and a plastic terminal receiving cavity is formed between the two limiting grooves. A receiving groove is formed on the top of the protrusion, and a micro switch is embedded in the receiving groove. The micro switch is electrically connected to the cylinder.

[0013] When the ejector pin is driven forward by the cylinder, its front end can extend into the cavity of the plastic part terminal and contact the terminal being tested.

[0014] In some embodiments, the cylinder assembly is surrounded by a housing, and the sidewall of the housing has a through opening for the telescopic block and the ejector pin to extend out; the bottom of the housing has at least three connecting seats, each of which is threadedly connected to the top of the support seat by fastening bolts.

[0015] In some embodiments, the support base is threaded with height adjustment feet at the four corners of the bottom. Each adjustment foot includes an upper screw, a middle locking nut, and a bottom rubber shock-absorbing pad. The bottom surface of the rubber shock-absorbing pad is provided with staggered anti-slip patterns.

[0016] In some embodiments, the top of the support base has two rows of waist-shaped adjustment holes along its length, with the long axis of the adjustment holes perpendicular to the direction of the pin movement; the bottom of the T-shaped fixing base is provided with mounting lugs that match the adjustment holes, and the position is adjusted by a wing bolt; a scale is provided on the top edge of the support base, with the scale direction parallel to the long axis of the adjustment holes.

[0017] Additional aspects and advantages of this invention will continue to be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of this invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the main view structure of this application;

[0020] Figure 2 This is a top view of the structure after removing the valve assembly;

[0021] Figure 3 yes Figure 2 A schematic diagram of the structure after removing the terminal positioning components;

[0022] Figure 4 yesFigure 1 Enlarged view of point A in the middle;

[0023] Figure 5 yes Figure 2 Enlarged view of point B in the middle.

[0024] Figure label:

[0025] Support base 1, mounting plane 11, waist-shaped adjustment hole 12, scale 13;

[0026] Air valve assembly 2, pressure regulating valve 21, pressure gauge 22, first air pipe 23, second air pipe 24;

[0027] Cylinder assembly 3, cylinder 31, cylinder piston rod 311, telescopic block 32, ejector pin 33;

[0028] Terminal positioning assembly 4, T-shaped fixing seat 41, protrusion 411, L-shaped notch 412, upright plate 42, positioning bolt 421, limiting groove 422, plastic terminal receiving cavity 423, receiving groove 413, micro switch 43, mounting lug 414, wing bolt 415;

[0029] 5. Outer shell; 51. Through opening; 52. Connecting seat; 53. Fastening bolt;

[0030] Height adjustment foot 6, upper screw 61, middle locking nut 62, rubber shock-absorbing pad 63. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Reference Figures 1-5 A plastic part terminal pin retraction detector includes a support base 1 and an air valve assembly 2, wherein the top of the support base 1 is a mounting plane 11, and further includes:

[0036] Air valve assembly 2: fixed to the side wall of support base 1, including a pressure regulating valve 21 and a pressure gauge 22 arranged in parallel. The pressure regulating valve 21 is connected to an external air source through a first air pipe 23 and is connected to the cylinder 31 through a second air pipe 24.

[0037] Cylinder assembly 3: includes a cylinder 31 horizontally mounted on the rear top of the support base 1, and a telescopic block 32 coaxially connected to the cylinder piston rod 311. The front end face of the telescopic block 32 is equipped with at least two ejector pins 33 arranged side by side, each ejector pin 33 being cylindrical.

[0038] Terminal positioning assembly 4: includes a T-shaped fixing seat 41 that can be detachably installed on the front top of the support base 1. The T-shaped fixing seat 41 has an upward protruding protrusion 411 in the middle. The protrusion 411 has symmetrical L-shaped notches 412 on both sides. Two upright plates 42 are respectively embedded in the L-shaped notches 412 and locked to the protrusion 411 by positioning bolts 421. The top height of the upright plate 42 is higher than the top surface of the protrusion 411.

[0039] The two upright plates 42 have limiting grooves 422 on their opposing sidewalls, which are roughly U-shaped. A plastic part terminal receiving cavity 423 is formed between the two limiting grooves 422. A receiving groove 413 is formed on the top of the protrusion 411. A micro switch 43 is embedded in the receiving groove 413. The micro switch 43 is electrically connected to the cylinder 31.

[0040] When the ejector pin 33 is driven forward by the cylinder 31, its front end can extend into the plastic part terminal receiving cavity 423 and contact the terminal being tested.

[0041] In some embodiments, the cylinder assembly 3 is surrounded by a housing 5, and the side wall of the housing 5 is provided with a through opening 51 for the telescopic block 32 and the ejector pin 33 to extend out; the bottom of the housing 5 is provided with at least three connecting seats 52, and each connecting seat 52 is threadedly connected to the top of the support seat 1 by fastening bolts 53.

[0042] This plastic part terminal retraction detector uses pneumatic drive and precise positioning to test the reliability of terminal insertion. During operation, the plastic part terminal to be tested is placed into the terminal receiving cavity 423 formed by the two upright plates 42. Pressing down on the plastic part terminal activates the microswitch 43. The air valve assembly 2 regulates the air pressure via the pressure regulating valve 21 and delivers it to the cylinder 31 through the second air pipe 24, driving the telescopic block 32 to move the ejector pin 33 forward. The ejector pin 33 simulates the actual insertion action of a pin and inserts into the inner cavity of the plastic part terminal. When there is a risk of retraction, the thrust of the ejector pin 33 will cause the terminal to detach from the plastic part housing. Releasing the pressure on the plastic part terminal disconnects the microswitch 43 and cuts off the air supply, stopping the cylinder. The test pressure can be precisely controlled by adjusting the pressure regulating valve 21. The position of the T-shaped fixing seat 41 can be adjusted via the adjustment hole 12 to accommodate terminals of different sizes. The height adjustment foot 6 ensures stable operation of the equipment, and the outer casing 5 provides protection for the moving parts.

[0043] The above structure achieves the following technical effects:

[0044] 1. Improved reliability: The dual-pin design simulates real-world insertion conditions, accurately detecting terminal misalignment issues; 2. Increased operational efficiency: Pneumatic drive enables automated testing, with a single test cycle of <3 seconds; 3. Wide applicability: Adjustable positioning structure adapts to different terminal sizes; 4. Guaranteed testing accuracy: 0.05MPa-level air pressure control ensures test repeatability of ±0.02mm; 5. Strong equipment stability: The anti-slip and shock-absorbing base eliminates over 90% of vibration interference; 6. Comprehensive safety protection: The enclosed casing prevents exposed mechanical parts, meeting safety standards; 7. Convenient maintenance: Modular design allows for quick disassembly and replacement of major components.

[0045] In some embodiments, the support base 1 is threaded with height adjustment feet 6 at the four corners of the bottom. Each adjustment foot 6 includes an upper screw 61, a middle locking nut 62 and a bottom rubber shock-absorbing pad 63. The bottom surface of the rubber shock-absorbing pad 63 is provided with staggered anti-slip patterns.

[0046] The height adjustment foot 6 is connected to the support base 1 via an upper screw 61 for height adjustment, and the middle locking nut 62 fixes the adjustment position. Rubber shock-absorbing pads 63 absorb equipment vibration, and the anti-slip texture on the bottom increases friction with the contact surface. Synchronous adjustment at the four corners ensures the worktable is level, and the equipment height can be precisely adjusted by rotating the screw 61 to adapt to different worktable height requirements.

[0047] In some embodiments, the top of the support base 1 has two rows of waist-shaped adjustment holes 12 along its length, and the long axis of the adjustment holes 12 is perpendicular to the movement direction of the ejector pin 33; the bottom of the T-shaped fixing base 41 is provided with mounting lugs 414 that match the adjustment holes 12, and the position is adjusted by means of wing bolts 415; a scale 13 is provided on the top edge of the support base 1, and the scale direction is parallel to the long axis of the adjustment holes 12.

[0048] The adjustment structure achieves precise positioning of the T-shaped fixing seat 41 through the cooperation of the oblong adjustment hole 12 and the wing bolt 415. During adjustment, loosening the wing bolt 415 allows the mounting lug 414 to slide along the long axis of the oblong hole. The displacement is determined by observing the reading on the scale 13 (accuracy ±0.5mm). After tightening the bolt, the displacement is constrained in the short axis direction of the adjustment hole 12 to ensure positioning stability. The vertical layout ensures that the movement trajectory of the ejector pin 33 is 90° orthogonal to the adjustment direction, avoiding interference.

[0049] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A terminal pin detection device for plastic parts, comprising a support base (1) and a gas valve assembly (2), the top of the support base (1) is a mounting plane (11), characterized in that: the gas valve assembly (2) is fixed to the side wall of the support base (1) and comprises a pressure regulating valve (21) and a pressure gauge (22), the pressure regulating valve (21) is connected to an external gas source through a first gas pipe (23) and communicates with a gas cylinder (31) through a second gas pipe (24); the gas cylinder assembly (3) comprises a gas cylinder (31) horizontally mounted on the top rear section of the support base (1), and a telescopic block (32) coaxially connected with the gas cylinder piston rod (311), the front end face of the telescopic block (32) is provided with at least two ejector pins (33); the terminal positioning assembly (4) comprises a T-shaped fixing seat (41) detachably mounted on the top front section of the support base (1), the middle part of the T-shaped fixing seat (41) is provided with a protruding lug (411) upward, L-shaped notches (412) are symmetrically formed on both sides of the lug (411), two vertical plates (42) are respectively embedded in the L-shaped notches (412) and locked and fixed with the lug (411) through positioning bolts (421), and the top of the vertical plate (42) is higher than the top surface of the lug (411); limiting grooves (422) are formed on the opposite side walls of the two vertical plates (42), and a plastic part terminal containing cavity (423) is formed between the two limiting grooves (422), a containing groove (413) is formed in the top of the lug (411), and a micro switch (43) is embedded in the containing groove (413), and the micro switch (43) is electrically connected with the gas cylinder (31); when the ejector pin (33) is driven forward by the gas cylinder (31), the front end thereof can extend into the plastic part terminal containing cavity (423) and contact the terminal to be measured.

2. The end-of-part ejector pin detector of claim 1, wherein: The periphery of the gas cylinder assembly (3) is covered with an outer shell (5), the side wall of the outer shell (5) is provided with a through opening (51) for the telescopic block (32) and the ejector pin (33) to extend out, and the bottom of the outer shell (5) is provided with at least three connecting seats (52), each connecting seat (52) is threadedly connected with the top of the support base (1) through a fastening bolt (53).

3. The end-of-part ejector pin detector of claim 1 or 2, wherein: The bottom of the support base (1) is threadedly connected with height adjusting feet (6) at the four corners, each adjusting foot (6) comprises an upper screw rod (61), a middle locking nut (62) and a bottom rubber shock pad (63), and the bottom surface of the rubber shock pad (63) is provided with staggered anti-skid lines.

4. The molded part terminal ejection detector of claim 3, wherein: Two rows of waist-shaped adjusting holes (12) are formed in the length direction of the top of the support base (1), the long axis direction of the adjusting hole (12) is perpendicular to the movement direction of the ejector pin (33), the bottom of the T-shaped fixing seat (41) is provided with a mounting lug (414) matched with the adjusting hole (12), and the position is adjusted through a butterfly bolt (415), and a scale (13) is arranged on the edge of the top of the support base (1), and the scale direction is parallel to the long axis direction of the adjusting hole (12).

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