Combined fixture for camera module SMA motor, and adhesive dispensing and curing process

Abstract

A combined fixture for a camera module SMA motor, and an adhesive dispensing and curing process. A bearing fixture is provided for bearing and constraining the position of a lower cover, and a press-fitting fixture is provided for pressing a base of a core component stacked on the lower cover against the lower cover by means of magnetic attachment between the press-fitting fixture and the bearing fixture, such that an adhesive applied between the lower cover and the base can be evenly spread. The magnetic attachment method solves the current problems associated with screw fastening, such as slow efficiency and foreign matter generation. Further provided is a pressure-holding fixture, which is configured for applying a pressure-holding force to the press-fitting fixture and the bearing fixture. Moreover, the pressure-holding force can be continuously applied in a high-temperature environment of an oven, allowing the pressing force between the base and the lower cover to be maintained, and the bonding force between the base and the lower cover to meet usage requirements once the adhesive is cured, thereby solving the current problems of uneven adhesive dispensing and insufficient bonding force between the core component of the SMA motor and the lower cover.

Description

Assembly fixture and dispensing curing process for SMA motors in camera modules Technical Field

[0001] This invention belongs to the field of SMA motor technology, and particularly relates to a combined fixture and dispensing curing process for SMA motors in camera modules. Background Technology

[0002] Auto focus (AF) works by using the principle of light reflection from the subject. The light reflected from the subject passes through the lens and forms an image on the image sensor. The computer processes the image generated by the image sensor to obtain the distance to the subject, and then automatically moves the lens to complete the focusing based on the distance.

[0003] To compensate for image blur caused by camera shake during exposure, optical image stabilization (OIS) technology was proposed. This technology uses a gyroscope to detect shake, and then an OIS motor translates or rotates the entire lens in the opposite direction to compensate for image blur caused by camera shake during exposure.

[0004] As a method to achieve the aforementioned AF and OIS, a motor assembly can be used to drive the lens to move or rotate. One type of such motor assembly is the shape memory alloy (SMA) motor, which is small in size and has strong driving capability, and is used in imaging devices.

[0005] SMA motors capable of AF and OIS require assembly jigs during the assembly of their core components (stator and mover) and lower cover. Typically, this is done manually using screws to secure the jig, tightly pressing the SMA motor core components and the lower cover's mating surfaces together after adhesive application. This process suffers from low efficiency, uneven pressure leading to uneven adhesive spread, and consequently, poor assembly accuracy and reliability. Furthermore, prolonged use of the jig can cause thread wear and stripping, rendering the jig unusable and resulting in high repair costs. Wear debris entering the SMA motor core components can also negatively impact the lens to varying degrees. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a combination fixture and dispensing curing process for SMA motors in camera modules, so as to solve the problems of uneven dispensing and insufficient bonding force between the core components of existing SMA motors and the lower cover.

[0007] To solve the above problems, the technical solution of the present invention is as follows:

[0008] This invention provides a jig for assembling an SMA motor in a camera module. The core component of the SMA motor is stacked within the inner cavity of a lower cover, and adhesive dispensing is performed between the base of the core component and the inner cavity of the lower cover. The jig includes:

[0009] At least one support fixture having at least one lower cover support position, and the lower cover support position being configured to at least partially conform to the outer contour of the lower cover;

[0010] At least one pressing fixture corresponds one-to-one with the supporting fixture, and the pressing fixture is configured to be attracted to the supporting fixture by a magnetic element and cooperate to form a fixture assembly; the pressing fixture has a core component pressing position corresponding one-to-one with the lower cover supporting position, and the core component pressing position is configured to be at least partially pressed against the base under the magnetic attraction force of the magnetic element so that the base is pressed tightly into the inner cavity of the lower cover;

[0011] A pressure-holding fixture has pressure-holding positions corresponding to the fixture assembly, the fixture assembly is placed at the corresponding pressure-holding positions, and the pressure-holding fixture is configured to support the fixture assembly and apply a pressure-holding force to the supporting fixture, wherein the pressure-holding force is continuously applied during the dispensing and baking stage.

[0012] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the supporting fixture includes a supporting body;

[0013] The supporting body is provided with a lower cover supporting area, and a number of lower cover supporting positions are provided at intervals in the lower cover supporting area. Each lower cover supporting position is provided with a number of outer edge limiting members, and each outer edge side of the lower cover corresponds to at least one of the outer edge limiting members.

[0014] The assembly fixture for SMA motors in camera modules of the present invention further includes several fixture positioning posts.

[0015] The fixture positioning posts are respectively arranged on the bearing body and located on both sides of the lower cover bearing area, and the pressing fixture is provided with fixture positioning holes corresponding to the fixture positioning posts.

[0016] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the magnetic component includes a carrier magnetic component and a pressing magnetic component, the carrier magnetic component is fixed to the carrier fixture, and the pressing magnetic component is fixed to the pressing fixture and corresponds one-to-one with the carrier magnetic component.

[0017] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the pressing fixture includes a base plate, a top plate, and a plurality of first elastic pressing members;

[0018] The substrate is magnetically attached to the support fixture, and the substrate has protruding holes that correspond one-to-one with the pressing positions of the core components; the top plate is mounted on the top surface of the substrate and forms an installation space communicating with the protruding holes; the first elastic pressing member is arranged in the installation space, and the connecting end of the first elastic pressing member is connected to the top plate, the pressing end of the first elastic pressing member passes through the protruding holes, and the pressing end of the first elastic pressing member is configured to press against the base so that the base is pressed tightly into the inner cavity of the lower cover.

[0019] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the first elastic pressing member includes a pressing block and a pressing elastic member;

[0020] The pressure block is vertically slidably connected within the installation space, and the bottom end of the pressure block extends out of the protrusion hole. The two ends of the pressing elastic element are respectively connected to the pressure block and the top plate.

[0021] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the pressing fixture further includes a plurality of second elastic pressing members, the second elastic pressing members corresponding one-to-one with the first elastic pressing members;

[0022] The second elastic pressing member includes a cover plate and a plurality of spring pins. The cover plate covers the top plate, and the spring pins pass through the top plate and the pressing block. The connecting end of the spring pin abuts against the cover plate, and the pressing end of the spring pin extends out of the pressing block and presses against the carrier of the core component. The plurality of spring pins are configured such that the number of pressing points formed on the carrier is greater than the number of pressing points formed by the pressing block on the base.

[0023] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the pressure-holding fixture includes a pressure-holding base plate, a pressure-holding cover plate, a plurality of elastic pressure-holding components and locking components;

[0024] The pressure-holding base plate is provided with a bearing groove for supporting the fixture assembly. The first end of the pressure-holding cover plate is rotatably connected to the first end of the pressure-holding base plate. The elastic pressure-holding components are respectively installed on the pressure-holding cover plate, and each pressing fixture of the fixture assembly is provided with at least one elastic pressure-holding component. The second end of the pressure-holding cover plate is locked to the second end of the pressure-holding base plate by the locking component. The elastic pressure-holding component is configured to output pressure to the corresponding pressing fixture under the locking force of the locking component acting on the pressure-holding cover plate.

[0025] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the locking component includes a locking rod and a hook component;

[0026] The locking rod is fixedly connected to the second end of the pressure-holding base plate, the hook is rotatably connected to the second end of the pressure-holding cover plate, and the hook is configured to have a groove for engaging with the locking rod.

[0027] The present invention provides a combined fixture for an SMA motor in a camera module, wherein the elastic pressure-holding component is a spring plunger;

[0028] The spring plunger is installed on the pressure-holding cover plate, and each of the pressing fixtures is provided with two spring plungers.

[0029] The present invention provides a dispensing and curing process, utilizing the combined fixture for SMA motors in camera modules described in any one of the above-mentioned embodiments, as follows:

[0030] Step S1: Install the lower cover to the lower cover bearing position of the bearing fixture, and fix the bearing fixture to the dispensing machine for dispensing operation;

[0031] Step S2: Clamp the core component and place it on the corresponding lower cover, so that the base of the core component is attached to the lower cover;

[0032] Step S3: Place the pressing fixture onto the supporting fixture, magnetically fix it, and form a fixture assembly;

[0033] Step S4: After assembling the fixture into the pressure-holding position of the pressure-holding fixture, place the whole assembly into the drying oven;

[0034] Step S5: Perform the curing operation.

[0035] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0036] In one embodiment of the present invention, a support fixture is used to support and limit the lower cover, and a pressing fixture is used to press the base of the core component stacked on the lower cover into the lower cover through magnetic attraction between the pressing fixture and the support fixture. This allows the adhesive between the lower cover and the base to be evenly spread. The magnetic attraction method can solve the problems of slow efficiency and foreign matter generation of existing screw fixing. Furthermore, considering that the adhesive needs to be cured at high temperature in an oven, and that the magnetic components may lose magnetism at high temperatures, resulting in a lack of tight adhesion between the pressing fixture and the support fixture, which in turn reduces the force acting on the base and the lower cover, leading to uneven adhesive spread, insufficient bonding force and delamination, a pressure-holding fixture is further provided to apply pressure to the pressing fixture and the support fixture. This pressure-holding fixture can be continuously applied in the high-temperature environment of the oven, so that the pressing force between the base and the lower cover can still be maintained. After the adhesive is cured, the bonding force between the base and the lower cover can meet the usage requirements, solving the problems of uneven adhesive application and insufficient bonding force between the existing SMA motor core component and the lower cover. Attached Figure Description

[0037] Figure 1 is a schematic diagram of the combined fixture for the SMA motor of the camera module according to the present invention;

[0038] Figure 2 is a schematic diagram of the fixture assembly for the combined fixture of the camera module SMA motor of the present invention;

[0039] Figure 3 is a schematic diagram of the support fixture for the combined fixture of the camera module SMA motor of the present invention;

[0040] Figure 4 is a schematic diagram of the pressing fixture of the combined fixture for the SMA motor of the camera module according to the present invention;

[0041] Figure 5 is another schematic diagram of the pressing fixture for the combined fixture of the camera module SMA motor of the present invention;

[0042] Figure 6 is a schematic diagram of the pressing fixture for removing the cover plate of the combined fixture for the SMA motor of the camera module according to the present invention.

[0043] Figure 7 is a schematic diagram of the pressing fixture for removing the cover plate and top plate of the combined fixture for the SMA motor of the camera module according to the present invention.

[0044] Figure 8 is a schematic diagram of the SMA motor supported by the combined fixture for the SMA motor of the camera module according to the present invention.

[0045] Figure 9 is a schematic diagram of the pressure-holding fixture of the combined fixture for the SMA motor of the camera module according to the present invention;

[0046] Figure 10 is another schematic diagram of the pressure holding fixture for the combined fixture of the camera module SMA motor of the present invention;

[0047] Figure 11 is a schematic diagram of the retaining hook of the pressure holding fixture of the combined fixture for the SMA motor of the camera module according to the present invention.

[0048] Explanation of reference numerals in the attached drawings: 1. Pressure holding fixture; 101. Pressure holding base plate; 102. Pressure holding cover plate; 103. Spring plunger; 104. Hook; 1041. Groove; 1042. Guide slope; 105. Locking rod; 106. Locking elastic element; 2. Bearing fixture; 201. Lateral limiting block; 202. Lower cover heat dissipation slot; 203. Longitudinal limiting block; 204. Inner ring surface limiting element; 205. Core assembly 1. Magnetic suction component; 206. Bearing magnetic component; 207. Fixture positioning post; 3. Pressing fixture; 301. Base plate; 302. Cover plate; 303. Pressing magnetic component; 304. Fixture positioning hole; 305. Pressure block; 306. Spring ejector pin; 307. Pressing elastic component; 308. Top plate; 4. Fixture assembly; 5. SMA motor; 501. Lower cover; 502. Base; 5021. Protruding post; 503. Carrier. Detailed Implementation

[0049] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a combined fixture and dispensing curing process for an SMA motor in a camera module according to the present invention. The advantages and features of the present invention will become clearer from the following description and claims. Example

[0050] Referring to Figure 1, in one embodiment, a combined fixture for the dispensing process of SMA motor 5 in a camera module is provided. The core component of SMA motor 5 is stacked in the inner cavity of the lower cover 501, and the base 502 of the core component is dispensed between the inner cavity of the lower cover 501. During the dispensing process, it needs to be placed in an oven for high-temperature curing. The combined fixture includes at least one bearing fixture 2, at least one pressing fixture 3, and a pressure holding fixture 1.

[0051] The support fixture 2 has at least one support position for the lower cover 501, and the support position for the lower cover 501 is configured to at least partially conform to the outer contour of the lower cover 501. That is, by conforming to the outer wall surface of the lower cover 501 and cooperating with the support fixture 2 to support the bottom surface of the lower cover 501, the lower cover 501 is limited in all degrees of freedom except for the upward degree of freedom. The pressing fixture 3 corresponds one-to-one with the carrier fixture 2, and the pressing fixture 3 is configured to be attracted to the carrier fixture 2 by magnetic components and cooperate to form fixture assembly 4. That is, the locking method between the pressing fixture 3 and the carrier fixture 2 is through magnetic attraction. The pressing fixture 3 has a core component pressing position that corresponds one-to-one with the carrier position of the lower cover 501, and the core component pressing position is configured to be at least partially pressed into the base 502 of the core component under the magnetic attraction of the magnetic components so that the base 502 is pressed tightly into the inner cavity of the lower cover 501, thereby achieving a tight fit between the bottom surface of the base 502 and the lower cover 501, so that the glue between the two can be spread evenly.

[0052] The pressure holding fixture 1 has a pressure holding position corresponding to the fixture assembly 4 (the number of pressure holding positions can be multiple, and the specific number can be determined according to the size that the oven can accommodate). The fixture assembly 4 is placed in the corresponding pressure holding position, and the pressure holding fixture 1 is configured to support the fixture assembly 2 and apply the pressure holding pressure of the pressure holding fixture 3 to the support fixture 2. The pressure holding pressure is continuously applied during the dispensing and baking stage, that is, the pressure holding pressure applied by the pressure holding fixture 1 to the fixture assembly 4 is not affected by high temperature (there may be a small range of changes in the pressure holding pressure of the pressure holding fixture 1 due to thermal expansion and contraction at high temperature, but this will not affect the pressure holding effect).

[0053] In this embodiment, a support fixture 2 is set to support and limit the lower cover 501, and a pressing fixture 3 is set to press the base 502 of the core component stacked on the lower cover 501 to the lower cover 501 through magnetic adsorption between the fixture 3 and the support fixture 2. This allows the glue between the lower cover 501 and the base 502 to be evenly spread. The magnetic adsorption method can solve the problems of slow efficiency and foreign matter generation caused by the existing screw fixing method. Furthermore, considering that the adhesive needs to be cured at high temperatures in an oven, and that the magnetic components may lose magnetism at high temperatures, resulting in a lack of tight adhesion between the pressing fixture 3 and the supporting fixture 2, which in turn reduces the force acting on the base 502 and the lower cover 501, causing uneven adhesive application, insufficient bonding force, and delamination, a pressure-holding fixture 1 is further designed to apply pressure to the pressing fixture 3 and the supporting fixture 2. This pressure-holding pressure can be continuously applied in the high-temperature environment of the oven, thereby maintaining the clamping force between the base 502 and the lower cover 501. After the adhesive cures, the bonding force between the base 502 and the lower cover 501 can meet the usage requirements, solving the problems of uneven adhesive application and insufficient bonding force between the core components of the existing SMA motor 5 and the lower cover 501.

[0054] The specific structure of the assembly fixture for the SMA motor 5 dispensing process of the camera module in this embodiment is further described below:

[0055] In this embodiment, the aforementioned support fixture 2 may include a support body. The support body has a lower cover 501 support area. Specifically, the support body can be configured as a long rectangle, and the lower cover 501 support area can be the middle portion of the top surface of the support body excluding its two ends in the length direction. A plurality of lower cover 501 support positions (arranged at intervals along the length direction) are spaced apart within the lower cover 501 support area, and each lower cover 501 support position is provided with a plurality of outer edge limiting members. Each outer edge side of the lower cover 501 corresponds to at least one outer edge limiting member. The outer edge limiting members in each lower cover 501 support position can be specifically divided into two lateral limiting members and two longitudinal limiting members (the lateral direction is the length direction of the support body, and the longitudinal direction is perpendicular to the length direction of the support body). The two lateral limiting members correspond to the two sides of the lower cover 501 in the lateral direction, and the two longitudinal limiting members correspond to the two sides of the lower cover 501 in the longitudinal direction.

[0056] Specifically, the lateral limiting component may include two lateral limiting blocks 201 spaced apart longitudinally, with the top surface of each lateral limiting block 201 having a chamfer on the side facing the lower cover 501. The two lateral limiting blocks 201 may be positioned at both ends near the longitudinal direction of the lower cover 501 to avoid stacked core components as much as possible and reduce the probability of damage. Furthermore, the corresponding lateral limiting blocks 201 within adjacent lower cover 501 bearing positions may be integrated. The vertical limiting component may be a single unit, with its top surface also having a chamfer on the side facing the lower cover 501. Additionally, several lower cover 501 heat dissipation slots 202 may be provided at both ends of the bearing body along the longitudinal direction of the lower cover 501 bearing position to accelerate heat dissipation and cooling.

[0057] Furthermore, the bearing position of the lower cover 501 may also be provided with a number of inner ring surface limiting members 204 corresponding to the inner ring surface of the through hole on the lower cover 501, so as to further improve the limiting effect on the lower cover 501.

[0058] Furthermore, each lower cover 501 can be provided with several core component magnetic attachments 205 to magnetically attract the core components, thereby further ensuring the pressing effect between the base 502 and the lower cover 501.

[0059] Furthermore, in order to achieve the installation positioning between the bearing fixture 2 and the pressing fixture 3, a number of fixture positioning posts 207 may be included. The fixture positioning posts 207 are respectively arranged on the bearing body and located on both sides of the bearing area of ​​the lower cover 501 (i.e., the two ends in the length direction of the bearing body). The pressing fixture 3 is provided with fixture positioning holes 304 corresponding to the fixture positioning posts 207. The two are positioned and installed through the fixture positioning posts 207 and fixture positioning holes 304.

[0060] In this embodiment, the aforementioned magnetic components include a carrier magnetic component 206 and a pressing magnetic component 303 (both are magnets). The carrier magnetic component 206 is fixed to the carrier fixture 2 and is also arranged on both sides of the carrier body located in the carrier area of ​​the lower cover 501 (i.e., at both ends in the length direction of the carrier body, and two longitudinally spaced carrier magnetic components 206 can be arranged at each end to ensure uniform distribution of pressing force). The pressing magnetic component 303 is fixed to the pressing fixture 3 and corresponds one-to-one with the carrier magnetic component 206.

[0061] In this embodiment, the pressing fixture 3 may specifically include a base plate 301, a top plate 308, and a plurality of first elastic pressing components.

[0062] The substrate 301 is magnetically attached to the support fixture 2 (i.e., the aforementioned pressing magnetic component 303 is correspondingly provided on the bottom surface of the substrate 301), and the substrate 301 is provided with protrusion holes corresponding one-to-one with the pressing positions of the core components (specifically, a number of transversely arranged recessed grooves can be provided on the top surface of the substrate 301, the space formed by the recessed grooves is used to accommodate the main body of the first elastic pressing component, and a through hole is provided on the bottom surface of the recessed groove, which is the aforementioned protrusion hole). The top plate 308 is mounted on the top surface of the substrate 301 and cooperates to form a mounting space communicating with the protrusion hole, that is, the top plate 308 cooperates with the aforementioned recessed groove to form a mounting space. The first elastic pressing member is arranged in the installation space, and the connecting end of the first elastic pressing member is connected to the top plate 308. The pressing end of the first elastic pressing member passes through the protrusion hole. The pressing end of the first elastic pressing member is configured to press against the base 502 so that the base 502 is pressed tightly against the inner cavity of the lower cover 501. That is, the pressing end of the first elastic pressing member is configured to protrude from the protrusion hole and after being pressed against the base 502, it can always maintain an elastic compression state under the action of the installation space or the top plate 308 so as to always maintain the output of elastic force (pressing force).

[0063] Specifically, the aforementioned first elastic pressing component may include a pressing block 305 and a pressing elastic component 307. The pressing block 305 is vertically slidably connected within the installation space, and its bottom end extends out of the protrusion hole. The two ends of the pressing elastic component 307 are respectively connected to the pressing block 305 and the top plate 308. The pressing elastic component 307 may specifically be a spring. The pressing block 305 may specifically include a sliding section with a larger cross-sectional area and a protruding section with a smaller cross-sectional area. The sliding section is slidably connected within the installation space, and the aforementioned spring is disposed between the top surface of the sliding section and the bottom surface of the top plate 308. The bottom surface of the protruding section is the pressing surface. The base 502 is generally rectangular and has four end corners, namely two pairs of end corners formed on the two diagonals, defined as two first diagonal ends and two second diagonal ends. Based on the design requirements of the base 502, several protruding posts 5021 are provided on the top surfaces of the two first diagonal ends, while the top surfaces of the second diagonal ends do not have these protruding posts 5021. The aforementioned pressing surfaces are used to press onto the protrusions 5021 on the two first diagonal ends respectively.

[0064] Furthermore, since the aforementioned pressing block 305 can only be pressed at the two corners of the base 502, unstable pressing may still occur. That is, there may be gaps between the base 502 and the lower cover 501 at the two second diagonal ends, the glue is not pressed evenly, the bonding strength is insufficient, and there is a risk of delamination. Therefore, the pressing fixture 3 may also include several second elastic pressing parts, and the second elastic pressing parts correspond one-to-one with the first elastic pressing parts.

[0065] The second elastic pressing component includes a cover plate 302 and a plurality of spring pins 306. The cover plate 302 covers the top plate 308 and can be directly fixed to the base plate 301 by bolts (the top plate 308 is located between the base plate 301 and the cover plate 302). The spring pins 306 can be configured to pass through the top plate 308 and the pressure block 305, and the connecting end (i.e. the upper end) of the spring pin 306 abuts against the cover plate 302. The pressing end (i.e. the lower end) of the spring pin 306 extends out of the pressure block 305 and presses against the carrier 503 of the core component. The plurality of spring pins 306 are configured such that the number of pressing points formed on the carrier 503 is greater than the number of pressing points formed on the base 502 by the pressure block 305. The number of spring pins 306 can be four, corresponding to the four corners of the carrier 503 respectively. The lower surface of the carrier 503 is attached to the base 502. The force generated by the spring pins 306 is also applied to the base 502 through the carrier 503, so that the four corners of the base 502 are evenly stressed and the glue is evenly spread on the lower cover 501 to avoid the risk of delamination.

[0066] In this embodiment, the pressure-holding fixture 1 may specifically include a pressure-holding base plate 101, a pressure-holding cover plate 102, a plurality of elastic pressure-holding components and locking components.

[0067] The pressure-holding base plate 101 is provided with a bearing groove for supporting the assembly of fixture 2. The length direction of the bearing groove can be set to the transverse direction mentioned above. The number of bearing grooves can be multiple, and the specific number can be determined according to the size of the oven. Each bearing groove can be arranged at intervals along the longitudinal direction, that is, the length direction of the pressure-holding base plate 101 is the longitudinal direction mentioned above (a chamfer can also be set at the end corners of the bearing groove and the bearing base plate to achieve foolproof). Similarly, a recessed through hole can also be provided on the bottom surface of the bearing groove to ensure the heat dissipation capacity of the assembled fixture. The first end of the pressure-holding cover plate 102 is rotatably connected to the first end of the pressure-holding base plate 101 (in order to enable the pressure-holding cover plate 102 to output a balanced pressure to each fixture assembly 4, the first end of the pressure-holding base plate 101 can be provided with a corresponding connecting protrusion, so that the rotation axis of the pressure-holding cover plate 102 connected to the connecting protrusion can match the height of the fixture assembly 4). Elastic pressure-holding components are respectively installed on the pressure-holding cover plate 102, and each fixture assembly 4 has at least one elastic pressure-holding component in its pressing fixture 3, that is, the elastic pressure-holding components are also arranged at intervals along the longitudinal direction. The second end of the pressure-holding cover plate 102 is locked to the second end of the pressure-holding base plate 101 by a locking component. The elastic pressure-holding component is configured to output a pressure to the corresponding pressing fixture 3 under the locking force of the locking component acting on the pressure-holding cover plate 102.

[0068] Specifically, the locking mechanism may include a locking lever 105 and a latch 104. The locking lever 105 is fixedly connected to the second end of the pressure-holding base plate 101. The second end of the pressure-holding base plate 101 may also be provided with two corresponding locking protrusions arranged laterally at intervals, and the locking lever 105 is installed between these two locking protrusions. The latch 104 is rotatably connected to the second end of the pressure-holding cover plate 102, and the latch 104 is configured to have a groove 1041 for engaging with the locking lever 105. The groove surface of the groove 1041 may be inclined at a small angle to prevent it from coming loose after engagement.

[0069] Furthermore, the locking component may also include a locking elastic element 106, which may specifically be a spring. The latching element 104 may specifically include a rotating section and latching sections and a reversing section located on both sides of the rotating section. The spring may be connected between the reversing section and the pressure-holding cover plate 102 to output the elastic force driving the locking component to rotate. The latching section may be configured to form an inwardly curved barb structure facing the corresponding locking rod 105. The inner side of the barb structure avoids forming the aforementioned locking groove 1041, and the outer side of the barb structure may be provided with a guide slope 1042 corresponding to the locking rod 105. Designed for quick locking and quick unlocking, it can improve work efficiency.

[0070] In this embodiment, the aforementioned elastic pressure-holding component can specifically be a spring plunger 103. The spring plunger 103 is installed on the pressure-holding cover plate 102 (its two ends can be fixed by nuts to prevent it from moving during use, and its compression distance can be adjusted by the nuts), and each pressing fixture 3 is provided with two spring plungers 103. Specifically, the pressure-holding cover plate 102 can be provided with a longitudinally extending central through hole to minimize the impact of the pressure-holding cover plate 102 on the heat dissipation of the fixture assembly 4 below. That is, the pressure-holding cover plate 102 has a rectangular frame structure, and the spring plungers 103 can be respectively installed on the two longitudinally extending frame bodies of the rectangular frame, thereby achieving pressure holding at both ends of each pressing fixture 3 in the lateral direction. Example

[0071] Based on Embodiment 1 above, this embodiment further describes the dispensing and curing process of the combined fixture used for the dispensing process of the SMA motor 5 in the camera module, as follows:

[0072] Step S1: Install the lower cover 501 to the lower cover bearing position of the bearing fixture 2, and fix the bearing fixture 2 to the dispensing machine for dispensing operation;

[0073] Step S2: Clamp the core component and place it on the corresponding lower cover 501, so that the base 502 of the core component is attached to the lower cover 501;

[0074] Step S3: Cover the pressing fixture 3 onto the supporting fixture 2, magnetically fix it, and form fixture assembly 4;

[0075] Step S4: After installing the fixture assembly 4 into the pressure holding position of the pressure holding fixture 1, place the whole assembly into the drying oven;

[0076] Step S5: Perform the curing operation.

[0077] Furthermore, taking pressure-holding fixture 1 with 11 pressure-holding positions as an example, the actual production process is explained as follows:

[0078] Step 1: Prepare raw materials and fixtures. Insert the lower cover 501 into the support fixture 2 according to the assembly direction.

[0079] Step 2: Observe under a 20x microscope whether the lower cover 501 is installed backwards into the carrier fixture 2 and whether it fits the surface of the carrier fixture 2. If it passes the inspection, proceed to the next step.

[0080] Step 3: Place the support fixture 2 (with the lower cover 501 installed) and the corresponding core components (in blister trays) into the plasma cleaning machine for cleaning. Place ≤10 support fixtures 2 and ≤3 core component trays on each layer of the cleaning machine, ensuring they are not overlapped. Confirm the plasma parameters (flow rate 35±3 sccm, power 400±10w, pressure 175±10Kpa, time 3±0.5min). After completion, start the cleaning process. If the product is not used within 1-1.5 hours after cleaning, it must be cleaned again before proceeding to the next process.

[0081] Step 4: After cleaning and placing the lower cover 501, fix the support fixture 2 on the desktop dispensing machine in the correct direction, and start the equipment to automatically complete the dispensing (the dispensing program has been pre-programmed).

[0082] Step 5: Inspect the glue under a 20x microscope for any breaks, leaks, or insufficient glue. If the glue quantity is OK, proceed to the next process.

[0083] Step 6: Use plastic tweezers to pick up the core components within the cleaning validity period, pick up the inner circle side of the carrier 503 with the tweezers, place it on the lower cover 501 in the correct direction, and gently press the two opposite corners of the base 502 with the tweezers to make the base 502 adhere to the lower cover 501.

[0084] Step 7: Place the pressing fixture 3 onto the supporting fixture 2 and fix it magnetically;

[0085] Step 8: Perform a full visual inspection using a 20x microscope to check if the parts are properly pressed together;

[0086] Step 9: Place several sets of fixtures 4 into a pressure-holding fixture 1, then place the whole set into the oven, record the placement time and quantity, open the oven and set the temperature to 85±5℃, and the curing time to 55±5min;

[0087] Step 10: After curing, remove the entire fixture, record the removal time and quantity, place it on the cooling plate to cool for more than 3 minutes, open the fixture and remove the product, thus completing the assembly process of the core components (stator assembly, mover assembly) and the lower cover.

[0088] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A combined fixture for an SMA motor in a camera module, characterized in that, The core components of the SMA motor are stacked within the inner cavity of the lower cover, and adhesive is applied between the base of the core components and the inner cavity of the lower cover, including: At least one support fixture having at least one lower cover support position, and the lower cover support position being configured to at least partially conform to the outer contour of the lower cover; At least one pressing fixture corresponds one-to-one with the supporting fixture, and the pressing fixture is configured to be attracted to the supporting fixture by a magnetic element and cooperate to form a fixture assembly; the pressing fixture has a core component pressing position corresponding one-to-one with the lower cover supporting position, and the core component pressing position is configured to be at least partially pressed against the base under the magnetic attraction force of the magnetic element so that the base is pressed tightly into the inner cavity of the lower cover; A pressure-holding fixture has pressure-holding positions corresponding to the fixture assembly, the fixture assembly is placed at the corresponding pressure-holding positions, and the pressure-holding fixture is configured to support the fixture assembly and apply a pressure-holding force to the supporting fixture, wherein the pressure-holding force is continuously applied during the dispensing and baking stage.

2. The combined fixture for an SMA motor in a camera module as described in claim 1, characterized in that, The support fixture includes a support body; The supporting body is provided with a lower cover supporting area, and a number of lower cover supporting positions are provided at intervals in the lower cover supporting area. Each lower cover supporting position is provided with a number of outer edge limiting members, and each outer edge side of the lower cover corresponds to at least one of the outer edge limiting members.

3. The combined fixture for an SMA motor in a camera module as described in claim 2, characterized in that, It also includes several fixture positioning posts. The fixture positioning posts are respectively arranged on the bearing body and located on both sides of the lower cover bearing area, and the pressing fixture is provided with fixture positioning holes corresponding to the fixture positioning posts.

4. The combined fixture for an SMA motor in a camera module as described in claim 1, characterized in that, The magnetic component includes a carrier magnetic component and a press-fit magnetic component. The carrier magnetic component is fixed to the carrier fixture, and the press-fit magnetic component is fixed to the press-fit fixture and corresponds one-to-one with the carrier magnetic component.

5. The combined fixture for an SMA motor in a camera module as described in claim 1, characterized in that, The pressing fixture includes a base plate, a top plate, and a plurality of first elastic pressing components; The substrate is magnetically attached to the support fixture, and the substrate has protruding holes that correspond one-to-one with the pressing positions of the core components; the top plate is mounted on the top surface of the substrate and forms an installation space communicating with the protruding holes; the first elastic pressing member is arranged in the installation space, and the connecting end of the first elastic pressing member is connected to the top plate, the pressing end of the first elastic pressing member passes through the protruding holes, and the pressing end of the first elastic pressing member is configured to press against the base so that the base is pressed tightly into the inner cavity of the lower cover.

6. The combined fixture for an SMA motor in a camera module as described in claim 5, characterized in that, The first elastic pressing component includes a pressing block and a pressing elastic component; The pressure block is vertically slidably connected within the installation space, and the bottom end of the pressure block extends out of the protrusion hole. The two ends of the pressing elastic element are respectively connected to the pressure block and the top plate.

7. The combined fixture for an SMA motor in a camera module as described in claim 6, characterized in that, The pressing fixture further includes a plurality of second elastic pressing elements, each of which corresponds to one of the first elastic pressing elements; The second elastic pressing member includes a cover plate and a plurality of spring pins. The cover plate covers the top plate, and the spring pins pass through the top plate and the pressing block. The connecting end of the spring pin abuts against the cover plate, and the pressing end of the spring pin extends out of the pressing block and presses against the carrier of the core component. The plurality of spring pins are configured such that the number of pressing points formed on the carrier is greater than the number of pressing points formed by the pressing block on the base.

8. The combined fixture for an SMA motor in a camera module as described in claim 1, characterized in that, The pressure-holding fixture includes a pressure-holding base plate, a pressure-holding cover plate, several elastic pressure-holding components, and locking components; The pressure-holding base plate is provided with a bearing groove for supporting the fixture assembly. The first end of the pressure-holding cover plate is rotatably connected to the first end of the pressure-holding base plate. The elastic pressure-holding components are respectively installed on the pressure-holding cover plate, and each pressing fixture of the fixture assembly is provided with at least one elastic pressure-holding component. The second end of the pressure-holding cover plate is locked to the second end of the pressure-holding base plate by the locking component. The elastic pressure-holding component is configured to output pressure to the corresponding pressing fixture under the locking force of the locking component acting on the pressure-holding cover plate.

9. The combined fixture for an SMA motor in a camera module as described in claim 8, characterized in that, The locking component includes a locking lever and a latch; The locking rod is fixedly connected to the second end of the pressure-holding base plate, the hook is rotatably connected to the second end of the pressure-holding cover plate, and the hook is configured to have a groove for engaging with the locking rod.

10. The combined fixture for an SMA motor in a camera module as described in claim 8, characterized in that, The elastic pressure-holding component is a spring plunger; The spring plunger is installed on the pressure-holding cover plate, and each of the pressing fixtures is provided with two spring plungers.

11. A dispensing and curing process, characterized in that, The combined fixture for the SMA motor of the camera module as described in any one of claims 1 to 10 is applied as follows: Step S1: Install the lower cover to the lower cover bearing position of the bearing fixture, and fix the bearing fixture to the dispensing machine for dispensing operation; Step S2: Clamp the core component and place it on the corresponding lower cover, so that the base of the core component is attached to the lower cover; Step S3: Place the pressing fixture onto the supporting fixture, magnetically fix it, and form a fixture assembly; Step S4: After assembling the fixture into the pressure-holding position of the pressure-holding fixture, place the whole assembly into the drying oven; Step S5: Perform the curing operation.

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