Clamp

Abstract

The embodiment of the utility model provides a clamp which comprises a base, a support and a test base, the support and the test base are arranged on the base, and the test base is provided with a containing groove; the clamping assembly comprises a downward pressing piece and a pressing head, the downward pressing piece is arranged on the support, the pressing head is located above the containing groove, and the downward pressing piece is used for driving the pressing head to move in the direction close to or away from the containing groove; the diffuse reflection sensor is used for sending a return signal if the to-be-detected piece is placed at a preset position in the accommodating groove; comprising a limiting part and a pushing part, and the pushing part is used for driving the limiting part to move towards the pressing head so that the limiting part can abut against the pressing head or driving the limiting part to move away from the pressing head; and the control part is electrically connected with the pushing part and is used for receiving and responding to the return signal to indicate the pushing part to drive the limiting part to move towards the direction far away from the pressing head, and is also used for indicating the limiting part to move towards the pressing head until the limiting part abuts against the pressing head before receiving the return signal. The embodiment of the utility model is at least beneficial to improving the fool-proof effect of the clamp.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of jigs, and particularly to a jig. Background Art

[0002] Generally, circuit boards and electronic components need to be tested to determine whether their quality meets the specifications. For example, the tests that need to be performed on circuit boards and electronic components include radio frequency performance tests and programming. Whether it is programming or radio frequency performance testing, it is necessary to fix the circuit boards and electronic components to be tested. Taking programming as an example, the current structure for fixing circuit boards or electronic components is a jig. During the programming process, the jig fixes the circuit board or electronic component and electrically connects the circuit board or electronic component to the programming machine for programming.

[0003] However, the currently used jigs can fix circuit boards or electronic components, but cannot ensure that the circuit boards or electronic components are fixed in place. Summary of the Utility Model

[0004] Embodiments of the present disclosure provide a jig, which is at least beneficial to improving the anti-fooling effect of the jig.

[0005] According to some embodiments of the present disclosure, on the one hand, an embodiment of the present disclosure provides a jig, including: a base; a bracket fixed to the base; a test base located on the base, the test base having a receiving groove for receiving a test piece; a clamping assembly, the clamping assembly including a downward pressing member and a pressing head connected to each other, the downward pressing member being disposed on the bracket, the pressing head being located above the receiving groove, the downward pressing member being used to drive the pressing head to move in a direction close to or away from the receiving groove; a diffuse reflection sensor located on one side of the bottom surface of the receiving groove facing the base, and the bottom surface of the receiving groove exposes the diffuse reflection sensor, the diffuse reflection sensor being used to detect whether the test piece is placed at a preset position in the receiving groove, and if the test piece is placed at the preset position in the receiving groove, a return signal is sent; a blocking member disposed on the bracket, the blocking member including a limiting portion and a pushing portion, the pushing portion being used to drive the limiting portion to move in a direction towards the pressing head so that the limiting portion abuts against the pressing head, or to drive the limiting portion to move in a direction away from the pressing head; a control portion, the control portion being electrically connected to the pushing portion, the control portion being used to receive the return signal and, in response to the return signal, instruct the pushing portion to drive the limiting portion to move in a direction away from the pressing head, and further being used to, before receiving the return signal, instruct the pushing portion to drive the limiting portion to move in a direction towards the pressing head until the limiting portion abuts against the pressing head.

[0006] In some embodiments, the pushing part includes a first elastic part and an electromagnetic lock. Two ends of the first elastic part are respectively connected to the electromagnetic lock and the limiting part. The electromagnetic lock is configured to drive the limiting part to move towards the pressing head so that the limiting part abuts against the pressing head, or drive the limiting part to move away from the pressing head.

[0007] In some embodiments, the receiving groove is composed of a rectangular groove and four notches communicating with the side wall of the rectangular groove. The four notches are respectively located at the edges of the rectangular groove extending in a direction perpendicular to the bottom surface of the rectangular groove.

[0008] In some embodiments, the pressing head includes a first part, a second part and a second elastic part. The first part is fixedly connected to the downward pressing member. Two ends of the second elastic part are respectively connected to the first part and the second part. The second part is configured to move towards the receiving groove and contact the test piece in the receiving groove.

[0009] In some embodiments, the orthographic projection of the diffuse reflection sensor on the bottom surface of the receiving groove is located in the central area of the bottom surface of the receiving groove.

[0010] In some embodiments, a groove is formed on the surface of the pressing head facing the receiving groove, and a through hole penetrating through the side wall of the groove is further formed on the side wall of the groove.

[0011] In some embodiments, at least two elastic limiting members are arranged on the side wall of the receiving groove. Along a first direction, the at least two elastic limiting members are arranged oppositely. One end of the elastic limiting member is configured to abut against the test piece in the receiving groove, and the first direction is parallel to the bottom surface of the receiving groove.

[0012] In some embodiments, a relief hole is formed on the bottom surface of the receiving groove.

[0013] In some embodiments, a plurality of through holes penetrating through the bottom surface of the receiving groove are formed on the bottom surface of the receiving groove; a test module is arranged between the test base and the base. The test module includes a plurality of elastic probes. Each elastic probe is exposed from one of the through holes, and one end of the elastic probe facing the pressing head is located in the receiving groove.

[0014] In some embodiments, the plurality of elastic probes include a test probe, a power supply probe and a ground probe. Along a direction perpendicular to the bottom surface of the receiving groove, the top end of the ground probe is higher than the top end of the power supply probe, and the top end of the ground probe is higher than the top end of the test probe.

[0015] The technical solutions provided by the embodiments of the present disclosure have at least the following advantages:

[0016] The fixture provided by the embodiments of the present disclosure is provided with a diffuse reflection sensor below the receiving groove. The diffuse reflection sensor can detect whether the workpiece to be tested is properly placed in the receiving groove and send a return signal when the workpiece to be tested is properly placed. The control unit is used to receive the return signal. Before receiving the return signal, the control unit instructs the pushing part to drive the limiting part to move towards the pressing head until the limiting part abuts against the pressing head, so as to ensure that the pressing head will not press down before the workpiece to be tested is properly placed, playing a good anti-fooling role; after receiving the return signal, the control unit can respond to the return signal and instruct the pushing part to drive the limiting part to move away from the pressing head, so as to facilitate the pressing head to press down and apply pressure to the workpiece to be tested in the receiving groove, so that the workpiece to be tested enters the test state. In this way, it is beneficial to ensure the safety of using the fixture, play an anti-fooling effect, and it is beneficial to realize the automation of the test by controlling the blocking part by the control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation; in order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0018] Figure 1 A perspective view of a fixture provided by an embodiment of the present disclosure;

[0019] Figure 2 is Figure 1 A side view of the provided fixture;

[0020] Figure 3 A perspective view of a test base and a diffuse reflection sensor provided by an embodiment of the present disclosure;

[0021] Figure 4 A perspective view of a pressing head in a fixture provided by an embodiment of the present disclosure;

[0022] Figure 5 is Figure 3 A top view of the shown test base;

[0023] Figure 6 A perspective view of a test module in a fixture provided by an embodiment of the present disclosure;

[0024] Figure 7 A rear view of a fixture provided by an embodiment of the present disclosure;

[0025] Figure 8Another perspective view of a fixture provided by an embodiment of the present disclosure. Detailed implementation manners

[0026] As can be seen from the background art, the currently used fixture can fix a circuit board or an electronic component, but it cannot ensure that the circuit board or the electronic component has been fixed in place.

[0027] The present disclosure provides a fixture. A diffuse reflection sensor is arranged below the accommodation groove. The diffuse reflection sensor can detect whether a to-be-tested part is placed in place in the accommodation groove and send a return signal when the to-be-tested part is placed in place. A limiting part, a pushing part and a control part are also provided. The control part is used to receive the return signal. Before receiving the return signal, the control part instructs the pushing part to drive the limiting part to move towards the pressing head until the limiting part abuts against the pressing head, so as to ensure that the pressing head will not press down before the to-be-tested part is placed in place, playing a good anti-fooling role; after receiving the return signal, the control part can respond to the return signal and instruct the pushing part to drive the limiting part to move away from the pressing head, so as to facilitate the pressing head to press down and apply pressure to the to-be-tested part in the accommodation groove, so that the to-be-tested part enters the test state.

[0028] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "a plurality of" is more than two, unless otherwise clearly and specifically defined. Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces).

[0029] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present disclosure. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: there is A, there is both A and B, and there is B. In addition, the character " / " in this article generally means that the associated objects before and after are in an "or" relationship.

[0031] In the description of the embodiments of the present disclosure, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present disclosure. For example, if the device or element in the drawing is inverted, then the element described as "below" or "beneath" or "under" or "at the bottom" of other elements or features will be oriented "above" or "at the top" of the other elements or features. Therefore, the term "below" can cover both the upper and lower orientations depending on the context in which the term is used, which will be obvious to those of ordinary skill in the art. The material can be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatial relative descriptors used herein can be interpreted accordingly.

[0032] In the description of the embodiments of the present disclosure, unless otherwise clearly defined and limited, technical terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] In the corresponding drawings of the embodiments of the present disclosure, for better understanding and convenience of description, the thickness and area of the layer are enlarged. In addition, when describing that a component is "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on a partial edge of the entire surface.

[0034] In the description of the embodiments of the present disclosure, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components may further be included. Forming or disposing a second component above or on a first component, or forming or disposing a second component on the surface of the first component, or forming or disposing a second component on one side of the first component, may include embodiments where the first component and the second component are in direct contact, and may also include embodiments where additional components may be present between the first component and the second component such that the first component and the second component may not be in direct contact. For simplicity and clarity, various components may be drawn at arbitrary scales. In the drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, forming or disposing a second component on the surface of the first component means that the first component is in direct contact with the second component. Among them, the above-mentioned "component" may refer to a layer, a film, a region, a part, a structure, etc.

[0035] The terms used in the description of the various embodiments herein are only for describing specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "the component" is also intended to include the plural form unless the context clearly indicates otherwise. Among them, the component includes components such as a layer, a film, a region, or a plate.

[0036] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present disclosure, many technical details are presented for the purpose of enabling the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can still be implemented.

[0037] Figure 1 A perspective view of a fixture provided for an embodiment of the present disclosure. Figure 2 For Figure 1 A side view of the provided fixture. Figure 3 A perspective view of a test base and a diffuse reflection sensor provided for an embodiment of the present disclosure.

[0038] Referring to Figures 1 to 3 , the fixture includes a base 100.

[0039] The base 100 may be a box structure, and a communication circuit board, a power supply, etc. may be arranged inside the box.

[0040] The fixture includes a bracket 101, which is fixed to the base 100.

[0041] The fixture includes a test base 102, which is located on the base 100. The test base 102 has a receiving groove 104 for receiving a device under test 103.

[0042] The fixture includes a clamping assembly 105. The clamping assembly 105 includes a downward pressing member 106 and a pressing head 107 which are connected. The downward pressing member 106 is arranged on the bracket 101, and the pressing head 107 is located above the receiving groove 104. The downward pressing member 106 is used to drive the pressing head 107 to move towards or away from the receiving groove 104.

[0043] The bracket 101 includes a sliding column 11, side plates 12 and a first support plate 13. The side plates 12 are located on opposite sides of the clamping assembly 105. The sliding column 11 extends along a direction perpendicular to the surface of the base 100 facing the clamping assembly 105. The top of the sliding column 11 is connected to the side plate 12 through a mounting block. The part of the pressing head 107 close to the sliding column 11 is slidably connected to the sliding column 11 to guide the movement of the pressing head 107 through the sliding column 11.

[0044] The first support plate 13 is fixed to the side plates 12 on both sides of the clamping assembly 105. A fixed bushing 14 is arranged at the lower end of the first support plate 13. The axial hole of the fixed bushing 14 extends along a direction perpendicular to the surface of the base 100 facing the clamping assembly 105. The downward pressing member 106 is slidably sleeved in the axial hole of the fixed bushing 14, and the fixed bushing 14 can define the movement direction of the downward pressing member 106.

[0045] The clamping assembly 105 may further include a pressure rod 111. The pressure rod 111 is hinged to the downward pressing member 106. By applying a force to the pressure rod 111, the downward pressing member 106 is driven to move towards or away from the receiving groove 104. When the pressure rod 111 rotates towards the downward pressing member 106 until the pressure rod 111 and the downward pressing member 106 form a 90° angle, the pressing head 107 completes the downward pressing, and the test piece 103 enters the test state.

[0046] The fixture includes a diffuse reflection sensor 108, which is located on the side of the bottom surface of the receiving groove 104 facing the base 100, and the bottom surface of the receiving groove 104 exposes the diffuse reflection sensor. The diffuse reflection sensor 108 is used to detect whether the test piece 103 is placed at a preset position in the receiving groove 104. If the test piece 103 is placed at the preset position in the receiving groove 104, a return signal is sent.

[0047] The diffuse reflection sensor 108 may be arranged in the base 100 and penetrate through the top of the base 100 and the bottom of the receiving groove 104. An inductor bracket 112 may be arranged in the base 100, and the diffuse reflection sensor 108 is sleeved on the inductor bracket 112 to fix the diffuse reflection sensor 108.

[0048] In some examples, the diffuse reflection sensor 108 may also be arranged on the base 100. The embodiments of the present disclosure do not make special limitations on the positional relationship between the diffuse reflection sensor 108 and the base 100.

[0049] It should be noted that the preset position refers to the state where the component 103 to be measured is placed flat and the test points on the component 103 are electrically connectable to the test equipment.

[0050] The fixture includes a blocking member disposed on the bracket 101. The blocking member includes a limiting portion 109 and a pushing portion 110. The pushing portion 110 is configured to drive the limiting portion 109 to move towards the pressing head 107 so that the limiting portion 109 abuts against the pressing head 107, or to drive the limiting portion 109 to move away from the pressing head 107.

[0051] The fixture includes a control portion (not shown). The control portion is electrically connected to the pushing portion 110. The control portion is configured to receive a retraction signal and, in response to the retraction signal, instruct the pushing portion 110 to drive the limiting portion 109 to move away from the pressing head 107. The control portion is further configured to, before receiving the retraction signal, instruct the pushing portion 110 to drive the limiting portion 109 to move towards the pressing head 107 until the limiting portion 109 abuts against the pressing head 107.

[0052] The control portion can be a PLC control system. In some embodiments, the control portion can be disposed within the base 100.

[0053] In the fixture provided by the embodiments of the present disclosure, the diffuse reflection sensor 108 can detect whether the component 103 to be measured is properly placed in the receiving groove 104 and send a retraction signal when the component 103 is properly placed. The control portion is configured to receive the retraction signal. Before receiving the retraction signal, the control portion instructs the pushing portion 110 to drive the limiting portion 109 to move towards the pressing head 107 until the limiting portion 109 abuts against the pressing head 107, so as to ensure that the pressing head 107 does not press down before the component 103 to be measured is properly placed, thereby playing a good anti-fooling role. After receiving the retraction signal, the control portion can, in response to the retraction signal, instruct the pushing portion 110 to drive the limiting portion 109 to move away from the pressing head 107, so as to facilitate the pressing head 107 to press down and apply pressure to the component 103 to be measured in the receiving groove 104, so that the component 103 enters the test state. In this way, it is beneficial to ensure the safety of using the fixture, achieve an anti-fooling effect, and realize the automation of the test by controlling the blocking member through the control portion.

[0054] In some embodiments, the pushing portion 110 can include a first elastic portion (not shown) and an electromagnetic lock (not shown). The two ends of the first elastic portion are respectively connected to the electromagnetic lock and the limiting portion 109. The electromagnetic lock is configured to drive the limiting portion 109 to move towards the pressing head 107 so that the limiting portion 109 abuts against the pressing head 107, or to drive the limiting portion 109 to move away from the pressing head 107.

[0055] The control unit is used to control the connection and disconnection of the power supply circuit that supplies power to the electromagnetic lock. Before the control unit receives the retraction signal, the control unit controls the disconnection of the power supply circuit, so that the electromagnetic lock does not generate a magnetic field, the first elastic part is in a non-deformed state, and the limiting part 109 abuts against the pressing head 107; after the control unit receives the retraction signal, in response to the retraction signal, the control unit controls the connection of the power supply circuit. Under the action of the magnetic field generated by the electromagnetic lock, the limiting part 109 moves away from the pressing head 107, so as to facilitate the pressing down of the pressing head 107. With such a setting, manual operation is not required, which is beneficial to controlling labor costs.

[0056] The first elastic part can be a helical spring or an air spring, etc.

[0057] Among them, the limiting part 109 can be a magnetic material limiting part or an electromagnetic lock.

[0058] In some examples, the blocking part is slidably arranged on the bracket; the fixture further includes an indicator light; the control unit is used to indicate the indicator light to turn on after receiving the retraction signal, so as to remind the operator that the test piece has been placed in place; after the operator finds that the indicator light is on, the pushing part can be manually moved away from the pressing head, so that the limiting part is away from the pressing head, facilitating the subsequent detection of the test piece.

[0059] Reference Figure 2 , the pressing head can include a first part 17, a second part 18 and a second elastic part (not shown). The first part 17 is fixedly connected to the pressing-down part 106. The two ends of the second elastic part are respectively connected to the first part and the second part. The second part 18 is used to move towards the accommodating groove 104 and contact the test piece 103 in the accommodating groove 104. With such a setting, after the pressing head 107 presses down to contact the test piece, the second elastic part can play a buffering role to prevent the pressing head from squeezing and deforming the test piece.

[0060] In some embodiments, the second elastic part can be a screw sleeved with a spring.

[0061] In some embodiments, the second elastic part can also be a spring. Among them, the first part 17 and the second part 18 can also be connected by screws to improve the connection stability between the first part 17 and the second part 18 through the screws.

[0062] The first part 17 can be provided with a plurality of laminates 27 along the extending direction of the pressing-down part. The laminates 27 are connected by connection structures such as screws or bolts. One of the laminates 27 also extends towards the sliding column 11 to slidably connect with the sliding column. Before the control unit receives the retraction signal, the limiting part 109 abuts against the lower surface of the laminate to prevent the pressing head from pressing down in advance.

[0063] Figure 4 It is a perspective view of the pressing head in a fixture provided by an embodiment of the present disclosure.Figure 4 The indenter provided in Figure 2 is basically similar to the indenter provided in Figure 4 In the indenter provided in Figure 4 in Figure 2 and the corresponding part in Figure 2 can refer to the description of

[0064] in the foregoing embodiments, which will not be elaborated in detail hereinafter.

[0064] Refer to Figure 4 , a groove 113 may be formed on the surface of the indenter 107 facing the receiving groove 104, and a through hole 114 penetrating the side wall of the groove 113 is further provided on the side wall of the groove 113. By providing the groove 113 and the through hole 114, during the process of the indenter 107 being pressed down until it is about to contact the test piece 103 to contacting the test piece 103, the air between the indenter 107 and the test piece 103 can be discharged through the groove 113 and the through hole 114, ensuring a better pressing effect. And compared with the surface of the indenter 107 facing the receiving groove 104 being a flat surface, the tension between the indenter 107 and the test piece 103 after pressing is greater. For example, by providing the groove 113 and the through hole 114, the tension between the indenter 107 and the test piece 103 after pressing is relatively large, thereby ensuring the stability of the conduction of the elastic probe 116 and ensuring a higher test efficiency.

[0065] Figure 5 is Figure 3 the top view of the test base shown in

[0066] Refer to Figure 3 and Figure 5 , the receiving groove 104 may be composed of a rectangular groove 1041 and four notches 1042 communicating with the side wall of the rectangular groove 1041. The four notches 1042 are respectively located at the edges of the rectangular groove 1041 extending along the direction perpendicular to the bottom surface of the rectangular groove 1041. The notches 1042 can avoid the irregular parts at the edge of the test piece 103, so as to ensure that the test piece 103 can be completely placed in the receiving groove 104.

[0067] The test piece 103 includes a circuit board or an electronic device. Taking the test piece 103 as a PCB circuit board as an example, the PCB circuit board is formed by cutting a PCB panel. Multiple PCB circuit boards in the PCB panel are connected by connecting ribs. After cutting the PCB panel to form the PCB circuit board, part of the connecting ribs still remain at the edge of the PCB circuit board. By providing the notches 1042, the connecting ribs can be avoided, so as to ensure that the PCB circuit board can be completely placed in the receiving groove 104.

[0068] A relief hole 117 may be formed in the bottom surface of the receiving groove 104. It should be noted that the surface of the DUT 103 is not necessarily flat, and a protruding structure, such as a shielding cover, may be provided on the DUT 103. By providing the relief hole 117, when the DUT 103 is placed in the receiving groove 104, the relief hole can accommodate the protruding part of the surface of the DUT 103, so as to reduce the possibility that the DUT 103 cannot be adjusted to the preset position.

[0069] In some examples, at least two elastic limiting members (not shown) may be provided on the side wall of the receiving groove 104. Along the first direction, the at least two elastic limiting members are oppositely arranged. One end of the elastic limiting member is used to abut against the DUT in the receiving groove, and the first direction is parallel to the bottom surface of the receiving groove. By providing the elastic limiting members, the receiving groove can accommodate DUTs of different sizes, so that the fixture can realize the testing of DUTs of different sizes.

[0070] Figure 6 A perspective view of a test module in a fixture provided in an embodiment of the present disclosure.

[0071] Reference Figure 1 、 Figure 3 、 Figure 5 And Figure 6 , the bottom surface of the receiving groove 104 has a plurality of through holes 115 penetrating the bottom surface of the receiving groove 104; a test module is provided between the test base 102 and the base 100. The test module includes a plurality of elastic probes 116. Each elastic probe 116 is exposed from a through hole 115, and one end of the elastic probe 116 facing the pressing head 107 is located in the receiving groove 104. During the process of the pressing head 107 applying pressure to the DUT 103, the DUT 103 can be made to apply pressure to the elastic probe 116, so that the elastic probe 116 is turned on, thereby entering the test state of the DUT 103.

[0072] The test module is used to perform a burn-in test or a radio frequency test on the DUT 103. Among them, the burn-in test refers to writing the machine code corresponding to the program into the DUT 103 through a burner to realize the corresponding function. The burner is electrically connected to the DUT 103 through the elastic probe 116; the radio frequency test is used to test the radio frequency performance of the DUT.

[0073] The plurality of elastic probes 116 may include test probes, power probes, and ground probes.

[0074] The other end of the test probe is connected to a test device, and the other end of the power probe is connected to a power supply. Among them, the test probe can be a radio frequency test probe or a programming probe. Taking the test probe as a programming probe as an example, the power probe 410 is used to dock with the power contact on the device under test 103 to provide a programming voltage, the ground probe is used to dock with the ground contact on the device under test 103 to trigger the device under test to enter the programming mode, and the programming probe is used to dock with the "DM / DP" contact on the device under test 103 to write and read programs.

[0075] In some embodiments, along the direction perpendicular to the bottom surface of the receiving groove 104, the top end of the ground probe is higher than the top end of the power probe, and the top end of the ground probe is higher than the top end of the test probe. By setting the top end of the ground probe higher than other probes, when the device under test 103 is placed in the receiving groove 104, it will first contact the ground probe. Before the press head 107 applies pressure to the device under test 103, the device under test 103 will not contact the power probe or the test probe, so as to ensure that before the press head 107 presses down, the power probe or the test probe will not be deformed by the weight of the device under test 103 itself and enter the test state.

[0076] In some embodiments, the test module further includes a shielding layer 125. The shielding layer 125 is located between the base 100 and the test base 102. The elastic probe 116 penetrates through the shielding layer 125 and the through hole 115. The shielding layer can play an anti-interference role during the process of testing the device under test.

[0077] Among them, the shielding layer 125 is fixed to the base and the test base through a connecting member 127.

[0078] Along the direction perpendicular to the extension direction of the elastic probe 116, the distance between the top end of the ground probe and the power probe or the test probe can be 0.2 mm - 0.5 mm. For example, the distance can be 0.2 mm, 0.23 mm, 0.31 mm, 0.38 mm, 0.42 mm, 0.49 mm or 0.5 mm.

[0079] In some embodiments, the orthographic projection of the diffuse reflection sensor 108 on the bottom surface of the receiving groove 104 is located in the central area (not shown) of the bottom surface of the receiving groove 104. After the device under test 103 is placed in the receiving groove 104, the central area of the device under test 103 is aligned with the central area of the bottom surface of the receiving groove 104. Compared with the edge area of the device under test 103, the change in the distance between the central area of the device under test 103 and the bottom surface of the receiving groove 104 during the leveling process is smaller, and it is easier to find the state where the device under test 103 is placed in place through the feedback of the diffuse reflection sensor 108.

[0080] Reference Figure 1, the fixture may further include a power switch 118, a test key (USB BOOT) 119, and a power on / off key (PWRKEY) 120. The power switch 118, the test key 119, and the power on / off key 120 may be disposed on the surface of the base 100 adjacent to the indenter 107 or on the side surface of the base 100.

[0081] Among them, the test key 119 is used to turn on the test state of the device under test 103. For example, it turns on the programming state or the radio frequency test state.

[0082] The fixture may further include two indicator lights 126. When powered on, the two indicator lights 126 emit red light and green light respectively. When the indicator light 126 emitting green light is on, it indicates that the power is on. When the indicator light 126 emitting red light is on, it indicates that a fault has occurred during the test process.

[0083] Figure 7 It is the rear view of a fixture provided by an embodiment of the present disclosure.

[0084] Refer to Figure 7 , the fixture may further include a power socket 121. The power socket may be disposed on the side wall of the base 100 to charge the power supply inside the base 100.

[0085] The fixture may further include a 232 / 485 converter 122 to facilitate remote communication between the fixture and intelligent devices equipped with different standard serial interfaces.

[0086] The fixture may be further provided with a DB9 interface 123, and the DB9 interface is used for the fixture to communicate with other intelligent devices based on the RS232 communication protocol.

[0087] The fixture may be further provided with a USB interface 128 and a plurality of terminal posts 124.

[0088] The power socket 121, the 232 / 485 converter 122, the DB9 interface 123, the USB interface 128, and the terminal posts 124 may all be disposed on the back of the base 100 to prevent the messy power socket 121, 232 / 485 converter 122, DB9 interface 123, USB interface 128, and terminal posts 124 from affecting the appearance.

[0089] Continue to refer to Figure 7 , in some embodiments, the bracket 101 further includes a second support plate 15 (refer to Figure 7 ), the second support plate 15 is fixed to the two side plates 12, and the limiting portion 109 is fixed on the second support plate 15.

[0090] Figure 8 It is another perspective view of a fixture provided by an embodiment of the present disclosure.

[0091] Refer to Figure 8, in some embodiments, the fixture may include a plurality of test bases 102, diffuse reflection sensors 108, clamping assemblies 105 and stoppers that match the number of the test bases 102, so as to facilitate the testing of a plurality of test pieces simultaneously.

[0092] For the fixture provided by an embodiment of the present disclosure, the diffuse reflection sensor 108 sends a retraction signal when the test piece 103 is placed in place. The control unit is configured to receive the retraction signal, and before receiving the retraction signal, the control unit instructs the pushing portion 110 to drive the limiting portion 109 to move towards the direction of the pressing head 107 until the limiting portion 109 abuts against the pressing head 107, so as to ensure that the pressing head 107 does not press down before the test piece 103 is placed in place, thereby playing a good anti-fooling role. After receiving the retraction signal, the control unit may, in response to the retraction signal, instruct the pushing portion 110 to drive the limiting portion 109 to move away from the pressing head 107, so as to facilitate the pressing head 107 to press down and apply pressure to the test piece 103 in the receiving groove 104, and the test piece 103 applies pressure to the elastic probe 116 below, so as to form an electrical connection between the test piece 103 and the elastic probe 116, thereby entering the test state.

[0093] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present disclosure, and in practical applications, various changes can be made to them in form and details without departing from the spirit and scope of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the scope defined by the claims.

Claims

1. A fixture, characterized in that, Comprising: Base; Bracket, fixed to the base; Testing base, located on the base, the testing base having a receiving groove for receiving a workpiece to be tested; Clamping assembly, the clamping assembly including a downward pressing member and a pressing head connected to each other, the downward pressing member being disposed on the bracket, the pressing head being located above the receiving groove, the downward pressing member being configured to drive the pressing head to move towards or away from the receiving groove; Diffuse reflection sensor, located on a side of the bottom surface of the receiving groove facing the base, and the bottom surface of the receiving groove exposing the diffuse reflection sensor, the diffuse reflection sensor being configured to detect whether the workpiece to be tested is placed at a preset position in the receiving groove, and if the workpiece to be tested is placed at the preset position in the receiving groove, then sending a retraction signal; Blocking member, disposed on the bracket, the blocking member including a limiting portion and a pushing portion, the pushing portion being configured to drive the limiting portion to move towards the pressing head, so that the limiting portion abuts against the pressing head, or drive the limiting portion to move away from the pressing head; Control unit, the control unit being electrically connected to the pushing portion, the control unit being configured to receive the retraction signal, and in response to the retraction signal, instruct the pushing portion to drive the limiting portion to move away from the pressing head, and further configured to, before receiving the retraction signal, instruct the pushing portion to drive the limiting portion to move towards the pressing head until the limiting portion abuts against the pressing head.

2. The fixture according to claim 1, characterized in that The pushing portion includes a first elastic portion and an electromagnetic lock, two ends of the first elastic portion being respectively connected to the electromagnetic lock and the limiting portion, the electromagnetic lock being configured to drive the limiting portion to move towards the pressing head, so that the limiting portion abuts against the pressing head, or drive the limiting portion to move away from the pressing head.

3. The fixture according to claim 1, characterized in that, The receiving groove is composed of a rectangular groove and four notches communicating with the side wall of the rectangular groove, the four notches being respectively located at edges of the rectangular groove extending in a direction perpendicular to the bottom surface of the rectangular groove.

4. The fixture according to claim 1 or 2, characterized in that, The pressing head includes a first portion, a second portion and a second elastic portion, the first portion being fixedly connected to the downward pressing member, two ends of the second elastic portion being respectively connected to the first portion and the second portion, the second portion being configured to move towards the receiving groove and contact the workpiece to be tested in the receiving groove.

5. The fixture according to claim 1, characterized in that, A positive projection of the diffuse reflection sensor on the bottom surface of the receiving groove is located in a central region of the bottom surface of the receiving groove.

6. The fixture according to claim 1, wherein A groove is formed on a surface of the pressing head facing the receiving groove, and a through hole penetrating through the side wall of the groove is further provided on the side wall of the groove.

7. The fixture according to claim 1, wherein At least two elastic limiting members are provided on the side wall of the receiving groove, and along a first direction, the at least two elastic limiting members are oppositely arranged, one end of the elastic limiting member being configured to abut against the workpiece to be tested in the receiving groove, the first direction being parallel to the bottom surface of the receiving groove.

8. The fixture according to claim 1, wherein A relief hole is formed on the bottom surface of the receiving groove.

9. The fixture according to claim 1, wherein The bottom surface of the receiving groove has a plurality of through holes penetrating through the bottom surface of the receiving groove; A test module is provided between the test base and the base. The test module includes a plurality of elastic probes. Each elastic probe is exposed from a through hole, and one end of the elastic probe facing the indenter is located in the receiving groove.

10. The fixture according to claim 9, characterized in that, The plurality of elastic probes include test probes, power supply probes, and ground probes. In a direction perpendicular to the bottom surface of the receiving groove, the top end of the ground probe is higher than the top end of the power supply probe, and the top end of the ground probe is higher than the top end of the test probe.

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