Split type elastic sheet micro needle module and test fixture

Abstract

The utility model belongs to test fixture technical field especially relates to a split type bullet micro needle module and test fixture. The both sides of core needle plate are established with first needle groove group and second needle groove group respectively, the first side edge needle plate and the second side edge needle plate respectively located the both sides of core needle plate, the side of first side edge needle plate is established with the third needle groove group corresponding with first needle groove group, the side of second side edge needle plate is established with the fourth needle groove group corresponding with second needle groove group, the first needle group and the second needle group are formed by a plurality of bullet micro needles, the part of bullet micro needle of first needle group is installed in first needle groove group, and a part is installed in third needle groove group, the part of bullet micro needle of second needle group is installed in second needle groove group, and a part is installed in fourth needle groove group. The utility model discloses a split type needle plate structure, disperses needle groove processing load, promotes needle plate deformation resistance, has the advantages such as convenient processing, high yield, low manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of testing fixture technology, and in particular relates to a split-type spring-loaded microneedle module and a testing fixture. Background Technology

[0002] In the field of modern precision instrument and electronic product manufacturing, high integration and miniaturization have become core development trends. To achieve more powerful functions within extremely limited space, key components such as connectors within products are constantly evolving towards greater precision and miniaturization. This trend directly poses a severe challenge to the testing phase of the production process: the spring-loaded microneedles used in test fixtures must correspondingly become thinner and finer, and the pin spacing needs to be continuously reduced to meet the requirements of testing high-density miniaturized products. Typical application scenarios require the spring-loaded microneedles to be approximately 0.08 mm thick, the center-to-center distance between adjacent microneedles to be compressed to approximately 0.175 mm, and the width of the slots on the pin plate used to fix these microneedles to be precisely machined to only approximately 0.09 mm.

[0003] Currently, the core structure of the commonly used spring-loaded microneedle modules is formed by milling the needle grooves that support the microneedles directly onto a single needle plate. However, when faced with the processing requirements of ultra-thin and ultra-dense microneedles, this traditional monolithic needle plate structure exposes significant process defects and performance bottlenecks. To accommodate the tiny microneedles, the milled needle grooves not only require high depth, but the material of the partition walls between the grooves becomes extremely thin. This design leads to a significant reduction in the overall mechanical strength and structural rigidity of the needle plate. During subsequent precision machining (such as milling and assembly) and actual use, this thin needle plate is prone to bending deformation and even localized fracture. The direct consequence is a low production yield, with a large number of needle plates being scrapped during the manufacturing stage, greatly increasing the overall manufacturing cost of microneedle modules and becoming a bottleneck restricting the efficient and low-cost testing of high-density miniaturized products.

[0004] Therefore, there is an urgent need for a split-type spring-loaded microneedle module and testing fixture that is easy to process, has a high yield rate, and low manufacturing cost. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a split-type spring-loaded microneedle module and testing fixture. By adopting a split-type needle plate structure with a core needle plate and two side needle plates, the processing load of the needle groove is distributed, and the deformation resistance of the needle plate is improved. It has the advantages of convenient processing, high yield, and low manufacturing cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A split-type spring-loaded microneedle module includes:

[0008] The core needle plate has a first needle groove group and a second needle groove group respectively opened on both sides;

[0009] The first side needle plate and the second side needle plate are respectively located on both sides of the core needle plate. A third needle groove group corresponding to the first needle groove group is opened on one side of the first side needle plate, and a fourth needle groove group corresponding to the second needle groove group is opened on one side of the second side needle plate.

[0010] A first needle group and a second needle group are composed of multiple spring-loaded microneedles; a portion of the spring-loaded microneedles of the first needle group are installed in the first needle groove group, and a portion are installed in the third needle groove group; a portion of the spring-loaded microneedles of the second needle group are installed in the second needle groove group, and a portion are installed in the fourth needle groove group.

[0011] Furthermore, the first needle groove group, the second needle groove group, the third needle groove group, and the fourth needle groove group are all formed by multiple needle grooves arranged side by side.

[0012] Furthermore, the needle grooves of the first needle groove group and the needle grooves of the third needle groove group are arranged facing each other and correspond one-to-one, and the needle grooves of the second needle groove group and the needle grooves of the fourth needle groove group are arranged facing each other and correspond one-to-one.

[0013] Furthermore, the spring-loaded microneedle includes a mounting portion for mounting into two corresponding needle slots, a contact portion located at the upper end of the mounting portion for contacting the product under test, and a connecting portion located at the lower end of the mounting portion for connecting to a circuit board.

[0014] Furthermore, the sum of the depths of the two pin grooves corresponding to the mounting portion is greater than the width of the mounting portion.

[0015] Furthermore, each of the aforementioned spring-loaded microneedles is provided with two of the aforementioned connecting portions.

[0016] This utility model also improves a testing fixture, including:

[0017] A fixing block, wherein a split-type spring-loaded microneedle module is installed inside the fixing block;

[0018] A floating plate is set above the fixed block, and the floating plate is provided with a test position for placing the product to be tested. The spring-loaded microneedles of the split spring-loaded microneedle module pass through the floating plate and are connected to the test position.

[0019] A circuit board is located below the fixing block, and the circuit board is electrically connected to the spring-loaded micro-needle.

[0020] Furthermore, a module assembly slot is provided at the lower end of the fixing block, and a micro-needle window penetrating the fixing block is provided in the module assembly slot. The split-type spring-loaded micro-needle module is installed in the module assembly slot, and the upper end of the spring-loaded micro-needle passes through the micro-needle window.

[0021] Furthermore, a cover plate is fixed to the lower end of the fixing block. The cover plate is used to fix the split-type spring-loaded micro-needle module inside the fixing block. A connecting through hole is provided on the cover plate, and the lower end of the spring-loaded micro-needle is connected to the circuit board through the connecting through hole.

[0022] Furthermore, the floating plate and the fixed block are connected by equal-height screws, and a floating spring is also provided between the floating plate and the fixed plate.

[0023] The beneficial effects of this utility model are:

[0024] This invention employs a split needle plate structure consisting of a core needle plate and two side needle plates, and installs the spring-loaded microneedles across corresponding needle groove groups on the core and side needle plates. This avoids weakening the structural strength of a single needle plate due to dense, deep grooves, thus improving the needle plate's resistance to deformation. By ensuring that the opposing needle grooves correspond one-to-one, precise alignment and installation of the two ends of the spring-loaded microneedles are guaranteed. By providing two connecting parts for each spring-loaded microneedle, single-point contact resistance is reduced, improving signal transmission stability. By setting module assembly slots and microneedle windows on the fixed block, the split spring-loaded microneedle module can be quickly positioned and installed. A cover plate ensures reliable locking of the split spring-loaded microneedle module within the fixture. A floating spring connects the floating plate and the fixed plate, allowing the floating plate to adaptively buffer when the product under test is pressed down, preventing overload damage. This invention, with its split needle plate structure consisting of a core needle plate and two side needle plates, distributes the needle groove processing load, improves the needle plate's resistance to deformation, and has the advantages of convenient processing, high yield, and low manufacturing cost. Attached Figure Description

[0025] Appendix Figure 1 This is a schematic diagram of the structure of the split-type spring-loaded microneedle module of this utility model;

[0026] Appendix Figure 2 This is an exploded structural diagram of the split-type spring-loaded micro-needle module of this utility model;

[0027] Appendix Figure 3 This is a schematic diagram of the structure of the spring-loaded microneedle of this utility model;

[0028] Appendix Figure 4 This is a schematic diagram of the structure of the test fixture of this utility model;

[0029] Appendix Figure 5 This is an exploded structural diagram of the test fixture of this utility model;

[0030] Appendix Figure 6 This is a schematic diagram of the structure of the split-type spring-loaded micro-needle module of this utility model assembled into the fixing block;

[0031] Appendix Figure 7 This is a structural schematic diagram of the fixing block of this utility model;

[0032] The diagram shows the following labels: 1-Separate spring-loaded microneedle module, 110-Core needle plate, 111-First needle groove group, 112-Second needle groove group, 120-First side needle plate, 121-Third needle groove group, 130-Second side needle plate, 131-Fourth needle groove group, 140-Spring-loaded microneedle, 141-Mounting part, 142-Contact part, 143-Connecting part, 150-First needle group, 160-Second needle group, 170-Needle groove; 2-Fixing block, 210-Module assembly slot, 211-Limiting block, 220-Microneedle window; 3-Floating plate, 310-Test position; 4-Circuit board; 5-Cover plate, 510-Connecting through hole; 6-Equal height screw; 7-Floating spring; 8-Support plate. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these 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 intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation 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.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] See appendix Figure 1 To be continued Figure 7 The figure shows a specific embodiment of the split-type spring-loaded microneedle module and test fixture provided by this utility model. Example 1:

[0038] See appendix Figure 1 and attached Figure 2 The split-type spring-loaded micro-needle module includes:

[0039] The core needle plate 110 has a first needle groove group 111 and a second needle groove group 112 respectively on both sides.

[0040] The first side needle plate 120 and the second side needle plate 130 are located on both sides of the core needle plate 110. The first side needle plate 120 has a third needle groove group 121 corresponding to the first needle groove group 111 on one side, and the second side needle plate 130 has a fourth needle groove group 131 corresponding to the second needle groove group 112 on one side.

[0041] A first needle group 150 and a second needle group 160 are composed of multiple spring-loaded microneedles 140; a portion of the spring-loaded microneedles 140 of the first needle group 150 are installed in the first needle groove group 111 and a portion are installed in the third needle groove group 121; a portion of the spring-loaded microneedles 140 of the second needle group 160 are installed in the second needle groove group 112 and a portion are installed in the fourth needle groove group 131.

[0042] See appendix Figure 1 and attached Figure 2In the above embodiment, the entire split-type spring-loaded microneedle module 1 has a left-right symmetrical structure, that is, the core needle plate 110 has a left-right symmetrical structure, and the first side needle plate 120 and the second side needle plate 130 have the same structure but opposite directions. The core needle plate 110 of the split-type spring-loaded microneedle module 1 is vertically arranged, and a first needle groove group 111 and a second needle groove group 112 formed by multiple needle grooves 170 arranged in parallel are respectively opened on both sides towards its symmetrical center line; the first side needle plate 120 and the second side needle plate 130 of the split-type spring-loaded microneedle module 1 have a single-sided slotted structure, the third needle groove group 121 opened on the first side needle plate 120 is arranged facing the first needle groove group 111 on the core needle plate 110, and the fourth needle groove group 131 opened on the second side needle plate 130 is arranged facing the second needle groove group 112 on the core needle plate 110. When installing the spring-loaded microneedles 140, the spring-loaded microneedles 140 are installed in the corresponding needle groove groups of the core needle plate 110, the first side needle plate 120, and the second side needle plate 130. This split needle plate structure distributes the needle groove processing load, avoids the structural strength of a single needle plate being weakened due to dense deep grooves, thereby improving the needle plate's resistance to deformation and reducing the processing scrap rate.

[0043] See appendix Figure 1 and attached Figure 2 In the above embodiments, the first pin groove group 111, the second pin groove group 112, the third pin groove group 121, and the fourth pin groove group 131 are all formed by multiple pin grooves 170 arranged side by side. The pin grooves 170 of the first pin groove group 111 and the pin grooves 170 of the third pin groove group 121 are arranged facing each other and correspond one-to-one, and the pin grooves 170 of the second pin groove group 112 and the pin grooves 170 of the fourth pin groove group 131 are arranged facing each other and correspond one-to-one. In this embodiment, the one-to-one correspondence of the facing pin grooves 170 ensures that the two ends of the spring microneedle 140 are accurately aligned and installed, avoiding the torsion and stress of the spring microneedle 140, and improving contact stability and lifespan. The pin groove group composed of multiple side by side pin grooves 170 facilitates the high-density arrangement of spring microneedles 140 to meet the testing needs of miniaturized products under test.

[0044] See appendix Figure 3 In the above embodiments, the spring-loaded microneedle 140 includes a mounting portion 141 for mounting into two corresponding needle slots 170, a contact portion 142 located at the upper end of the mounting portion 141 for contacting the product under test, and a connecting portion 143 located at the lower end of the mounting portion 141 for connecting to the circuit board 4. In the embodiments, the mounting portions 141 of the spring-loaded microneedle 140 are installed across two corresponding needle slots 170, so that the spring-loaded microneedle 140 is reliably fixed in the needle slots 170, achieving accurate contact with the product under test and stable conductivity with the circuit board 4. In some optional embodiments, the mounting portion 141 of the spring-loaded microneedle 140 has an elastic structure, which facilitates elastic contact when in contact with the product under test.

[0045] See appendix Figure 1 In the above embodiment, the sum of the depths of the two needle grooves 170 corresponding to the mounting portion 141 is greater than the width of the mounting portion 141. In the embodiment, there is a gap between the core needle plate 110 and the first side needle plate 120. The left side portion of the mounting portion 141 of the spring-loaded microneedle 140 of the first needle group 150 is located in the needle groove 170 of the first side needle plate 120, the right side portion is located in the needle groove 170 on the left side of the core needle plate 110, and the middle portion is located in the gap. There is also a gap between the core needle plate 110 and the second side needle plate 130. The left side portion of the spring-loaded microneedle 140 of the second needle group 160 is located in the needle groove 170 on the right side of the core needle plate 110, the right side portion is located in the needle groove 170 of the second side needle plate 130, and the middle portion is located in the gap. In this embodiment, taking the core needle plate 110 and the first side needle plate 120 as examples, the groove depth of the needle groove 170 of the first needle groove group 111 of the core needle plate 110 can be set to 1 / 3 of the width of the spring micro needle 140. Similarly, the groove depth of the needle groove 170 of the third needle groove group 121 of the first side needle plate 120 can be set to 1 / 3 of the width of the spring micro needle 140. The remaining middle 1 / 3 of the spring micro needle 140 is located in the gap between the core needle plate 110 and the first side needle plate 120. Compared with the traditional method of directly milling on the whole needle plate, this embodiment greatly reduces the processing difficulty of the needle groove 170.

[0046] See appendix Figure 3 In the above embodiments, each spring-loaded microneedle 140 is provided with two connecting portions 143. In these embodiments, the two connecting portions 143 enable two-point circuit board connection, reducing single-point contact resistance and improving signal transmission stability and current carrying capacity. Example 2:

[0047] See appendix Figure 4 and attached Figure 5 This embodiment provides a test fixture, including:

[0048] Fixing block 2, the split-type spring-loaded micro-needle module 1 in the aforementioned embodiment is installed inside fixing block 2;

[0049] A floating plate 3 is floating above the fixed block 2. The floating plate 3 is provided with a test position 310 for placing the product to be tested. The spring micro needle 140 of the split spring micro needle module 1 passes through the floating plate 3 and connects to the test position 310.

[0050] The circuit board 4 is located below the fixing block 2 and is electrically connected to the spring-loaded micro-pin 140.

[0051] See appendix Figure 5In the above embodiment, a support plate 8 is also provided below the circuit board 4 to support the entire test fixture. The test position 310 is located on the upper surface of the floating plate 3. Multiple through holes are provided at the bottom of the test position 310. The spring-loaded micro-needle 140 of the split spring-loaded micro-needle module 1 on the fixing block 2 is connected to the test position 310 through the through holes. When the product to be tested is placed in the test position 310 and then placed on the floating plate 3, the floating plate 3 moves down, causing the spring-loaded micro-needle 140 to protrude into the test position 310 and abut against the test point on the product to be tested, thus realizing the test.

[0052] See appendix Figure 6 and attached Figure 7 In the above embodiment, a module assembly slot 210 is provided at the lower end of the fixing block 2, and a microneedle window 220 penetrating the fixing block 2 is provided in the module assembly slot 210. The split-type spring-loaded microneedle module 1 is installed in the module assembly slot 210, and the upper end of the spring-loaded microneedle 140 passes through the microneedle window 220. In this embodiment, by providing the module assembly slot 210 and the microneedle window 220 in the fixing block 2, it is convenient to quickly position and install the split-type spring-loaded microneedle module 1, and to ensure that the spring-loaded microneedle 140 accurately passes through the floating plate 3 to reach the test position. In this embodiment, the module assembly slot 210 is also provided with four limiting blocks 211, two of which correspond to the gaps at the front and rear ends between the core needle plate 110 and the first side needle plate 120, and the other two correspond to the gaps at the front and rear ends between the core needle plate 110 and the second side needle plate 130, thereby realizing the separate limiting of the core needle plate 110, the first side needle plate 120, and the second side needle plate 130, and fixing the position of each needle plate.

[0053] See appendix Figure 6 In the above embodiment, a cover plate 5 is fixed to the lower end of the fixing block 2. The cover plate 5 is used to fix the split-type spring-loaded micro-needle module 1 inside the fixing block 2. A connecting through hole 510 is provided on the cover plate 5, and the lower end of the spring-loaded micro-needle 140 is connected to the circuit board 4 through the connecting through hole 510. In this embodiment, the cover plate 5 is used to reliably lock the split-type spring-loaded micro-needle module 1 in the fixture, while the connecting through hole 510 provides a protective channel for the spring-loaded micro-needle 140 to connect to the circuit board 4, preventing the pins from bending.

[0054] See appendix Figure 5 In the above embodiment, the floating plate 3 and the fixed block 2 are connected by equal-height screws 6, and a floating spring 7 is also provided between the floating plate 3 and the fixed block 2. In this embodiment, the floating plate 3 and the fixed block 2 are connected by equal-height screws 6 to limit the maximum floating height of the floating plate 3, and the floating spring 7 is used to realize the floating effect of the floating plate 3 relative to the fixed block 2, so that the floating plate 3 can adaptively buffer when the product under test is pressed down, preventing overload damage.

[0055] In summary, this embodiment provides a split-type spring-loaded microneedle module and a test fixture. By employing a split-type needle plate structure with a core needle plate 110 and two side needle plates, and by installing the spring-loaded microneedles across the corresponding needle groove groups of the core needle plate 110 and the side needle plates, the structural strength of a single needle plate is not weakened due to dense deep grooves, thus improving the deformation resistance of the needle plate. By ensuring that the opposing needle grooves 170 correspond one-to-one, the precise alignment and installation of the two ends of the spring-loaded microneedles 140 are ensured. By providing two connecting parts 143 for each spring-loaded microneedle 140, the single-point contact resistance is reduced, and the signal transmission stability is improved. Qualitative analysis: By setting a module assembly slot 210 and a microneedle window 220 on the fixed block 2, the split-type spring-loaded microneedle module can be quickly positioned and installed; by setting a cover plate 5, the split-type spring-loaded microneedle module 1 can be reliably locked in the fixture; by connecting the floating plate 3 and the fixed block 2 with a floating spring 7, the floating plate 3 can adaptively buffer when the product under test is pressed down, preventing overload damage; This embodiment adopts a split-type needle plate structure with a core needle plate and two side needle plates, which disperses the needle groove processing load and improves the needle plate's resistance to deformation, and has the advantages of convenient processing, high yield, and low manufacturing cost.

[0056] The embodiments described above are merely one of the preferred embodiments of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of this utility model should be included within the protection scope of this utility model.

Claims

1. A split-type spring-loaded microneedle module, characterized in that, include: The core needle plate (110) has a first needle groove group (111) and a second needle groove group (112) respectively on both sides. A first side needle plate (120) and a second side needle plate (130) are respectively located on both sides of the core needle plate (110). A third needle groove group (121) corresponding to the first needle groove group (111) is opened on one side of the first side needle plate (120), and a fourth needle groove group (131) corresponding to the second needle groove group (112) is opened on one side of the second side needle plate (130). A first needle group (150) and a second needle group (160) are composed of multiple spring-loaded microneedles (140); a portion of the spring-loaded microneedles (140) of the first needle group (150) are installed in the first needle groove group (111), and a portion are installed in the third needle groove group (121); a portion of the spring-loaded microneedles (140) of the second needle group (160) are installed in the second needle groove group (112), and a portion are installed in the fourth needle groove group (131).

2. The split-type spring-loaded microneedle module according to claim 1, characterized in that, The first needle groove group (111), the second needle groove group (112), the third needle groove group (121) and the fourth needle groove group (131) are all formed by multiple needle grooves (170) arranged side by side.

3. A split-type spring-loaded microneedle module according to claim 2, characterized in that, The needle grooves (170) of the first needle groove group (111) are arranged facing each other and correspond one-to-one with the needle grooves (170) of the third needle groove group (121), and the needle grooves (170) of the second needle groove group (112) are arranged facing each other and correspond one-to-one with the needle grooves (170) of the fourth needle groove group (131).

4. A split-type spring-loaded microneedle module according to claim 2, characterized in that, The spring-loaded microneedle (140) includes a mounting part (141) for mounting into two corresponding needle slots (170), a contact part (142) located at the upper end of the mounting part (141) for contacting the product to be tested, and a connection part (143) located at the lower end of the mounting part (141) for connecting to the circuit board (4).

5. A split-type spring-loaded microneedle module according to claim 4, characterized in that, The sum of the depths of the two pin grooves (170) corresponding to the mounting part (141) is greater than the width of the mounting part (141).

6. A split-type spring-loaded microneedle module according to claim 4, characterized in that, Each of the aforementioned spring-loaded microneedles (140) is provided with two of the aforementioned connecting portions (143).

7. A test fixture, characterized in that, include: Fixing block (2), wherein a split-type spring-loaded micro-needle module (1) according to any one of claims 1-6 is installed in the fixing block (2); A floating plate (3) is floating above the fixed block (2). The floating plate (3) is provided with a test position (310) for placing the product to be tested. The spring microneedles (140) of the split spring microneedle module (1) pass through the floating plate (3) and connect to the test position (310). A circuit board (4) is located below the fixing block (2), and the circuit board (4) is electrically connected to the spring-loaded micro-needle (140).

8. A test fixture according to claim 7, characterized in that, The lower end of the fixing block (2) is provided with a module assembly slot (210), and a micro-needle window (220) penetrating the fixing block (2) is provided in the module assembly slot (210). The split-type spring micro-needle module (1) is installed in the module assembly slot (210), and the upper end of the spring micro-needle (140) passes through the micro-needle window (220).

9. A test fixture according to claim 8, characterized in that, The lower end of the fixing block (2) is fixed with a cover plate (5). The cover plate (5) is used to fix the split spring micro needle module (1) inside the fixing block (2). The cover plate (5) has a connecting through hole (510). The lower end of the spring micro needle (140) is connected to the circuit board (4) through the connecting through hole (510).

10. A test fixture according to claim 7, characterized in that, The floating plate (3) and the fixed block (2) are connected by equal-height screws (6), and a floating spring (7) is also provided between the floating plate (3) and the fixed block (2).

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