A jig for assembly and a method for locking a pressure ring of a lens module

Abstract

The present invention discloses a jig for assembly and a method for locking a pressure ring of a lens module, which relates to the field of lens assembly technology, and includes a jig body, one end of which is detachably connected to a connecting portion, and the other end of which is provided with a sleeve structure for limiting the lens pressure ring, the sleeve structure being provided with a limiting assembly and at least two driving parts, the driving parts being arranged on the sleeve structure, the driving parts being able to engage with the positioning grooves of the lens pressure ring, the limiting assembly being inserted at the central axis of the jig body, the limiting assembly being able to rotate with the central axis of the jig body as the rotation center, the limiting assembly including a pre-tightening structure and an adsorption member, the adsorption member having a tendency to move in a direction away from the sleeve structure under the action of the pre-tightening structure, wherein the adsorption member can be retracted into the sleeve structure under the action of an external force. The jig for assembly of the present invention can effectively prevent the lens from rotating when assembling and locking the lens, and avoid ink scraping from the lens when the lens pressure ring is tightened.

Description

Technical Field

[0001] The present invention relates to the technical field of lens assembly, and in particular to a jig for assembly and a method for locking a pressure ring of a lens module. Background Art

[0002] Currently, retaining rings are assembled to lenses via a threaded fit. A latch is machined onto the retaining ring to facilitate force-locking. A torque driver is used to control the torque, but this can sometimes cause ink scraping if ink is applied to the lens' outer diameter. To achieve a non-scratching retaining ring, the retaining ring can be tightened manually or by applying torque using a torque jig. This method has the following disadvantages: 1) The retaining ring cannot be unscrewed multiple times to remove the lens for cosmetic repairs. Repeated tightening can easily cause ink scraping. 2) The amount of torque applied depends on individual factors. Excessive torque can cause the retaining ring to exert excessive force on the lens, potentially breaking it. Excessive torque can cause the lens to loosen, resulting in poor resolution or even the inability to form an image. 3) Direct contact between the retaining ring and the hand can also easily cause cosmetic defects, increasing the time required for cosmetic repairs and significantly reducing the yield rate of the finished product. Summary of the Invention

[0003] The present invention aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, an embodiment of the present invention provides an assembly jig that effectively prevents the lens from rotating during lens assembly and locking, thereby preventing ink from falling from the lens when the lens retaining ring is tightened.

[0004] An embodiment of the present invention further provides a method for locking a pressure ring of a lens module.

[0005] According to an embodiment of the first aspect of the present invention, a jig for assembly is provided, comprising a jig body, one end of the jig body being detachably connected to a connection portion capable of being adapted to a screwdriver bit, and the other end being provided with a sleeve structure for limiting a lens pressure ring, the sleeve structure being provided with a limiting assembly and at least two driving portions, the driving portions being arranged on the sleeve structure, the driving portions being capable of engaging with positioning grooves of the lens pressure ring, the limiting assembly being inserted at the central axis of the jig body, the limiting assembly being capable of rotating with the central axis of the jig body as the rotation center, the limiting assembly comprising a pre-tightening structure and an adsorption member, the adsorption member having a tendency to move in a direction away from the sleeve structure under the action of the pre-tightening structure, wherein the adsorption member can retract into the sleeve structure under the action of an external force.

[0006] The above-mentioned jig for assembly has at least the following beneficial effects: the overall structure is simple and easy to use. Specifically, when in use, the lens on the lens module body is sucked tightly by the adsorption part, and the jig body is pressed toward the lens pressure ring until the sleeve structure is arranged outside the lens pressure ring and the driving part is engaged with the positioning groove. After the above is completed, the electric screwdriver is connected to the connecting part, and the maximum torque is adjusted and then started. The electric screwdriver drives the jig body to rotate through the connecting part, and the jig body drives the lens pressure ring to rotate and tighten through the engagement of the driving part with the positioning groove, effectively ensuring that the lens pressure ring is evenly stressed and the tightening torque is qualified, avoiding the deformation of the lens pressure ring or the failure of the lens pressure ring to be locked in place due to uneven force. Among them, when the lens pressure ring rotates, since the limit assembly can rotate with the central axis of the jig body as the rotation center, and the adsorption part acts on the lens with a certain pre-pressure, the lens will not rotate with the lens pressure ring, that is, there will be no friction between the lens and the inner wall of the lens barrel to cause ink scraping.

[0007] According to the jig for assembly described in the first aspect of the present invention, the pre-tightening structure includes a first connecting shaft and an elastic member, the first connecting shaft is inserted into the jig body, one end of the first connecting shaft is connected to the jig body through a limit assembly, so that the first connecting shaft can rotate and perform linear reciprocating motion along the central axis direction of the jig body, the other end of the first connecting shaft is sleeved with the adsorption member, one end of the elastic member is pressed against the jig body, and the other end is pressed against the first connecting shaft.

[0008] According to the jig for assembly described in the first aspect of the present invention, the limiting assembly includes a second connecting shaft and a bearing, a movable groove is provided in the middle of one end of the jig body connected to the connecting portion, the bearing is fixed to the movable groove, one end of the second connecting shaft has a limiting boss, and the other end is detachably connected to the first connecting shaft that passes through the bottom of the movable groove after clearance fit with the inner ring of the bearing.

[0009] According to the assembly jig described in the first aspect of the present invention, one end of the first connecting shaft is provided with an external thread, the second connecting shaft is provided with a screw hole matching the external thread, and the connecting portion is fixedly connected to the jig body by screws.

[0010] According to the jig for assembly described in the first aspect of the present invention, the elastic member is a spring, a countersunk hole is provided in the middle of the sleeve structure, the countersunk hole is connected to the movable groove, the first connecting shaft is provided with a limiting portion, the spring is sleeved on the first connecting shaft, and after one end of the first connecting shaft passes through the countersunk hole and the movable groove in sequence to connect to the second connecting shaft, one end of the spring abuts against the bottom of the countersunk hole, and the other end abuts against the limiting portion.

[0011] According to the jig for assembly described in the first aspect of the present invention, the adsorption component is a vacuum suction cup, and the end of the first connecting shaft has a convex edge for the vacuum suction cup to be clamped.

[0012] According to the jig for assembly described in the first aspect of the present invention, the sleeve structure includes a first enclosure and a second enclosure, the first enclosure is arranged around the outer edge of the end of the jig body, and the second enclosure is arranged around the end of the jig body and fits against the inner wall of the first enclosure to form a step for limiting the lens pressure ring.

[0013] According to the jig for assembly described in the first aspect of the present invention, the driving part is connected to the jig body by bolts, and the driving part is distributed in a circular array with the central axis of the jig body as the center. One end of the driving part is positioned in the card slot adapted to be provided on the sleeve structure, and the other end extends toward the central axis of the jig body.

[0014] According to the jig for assembly described in the first aspect of the present invention, the slot passes through the first enclosure and the second enclosure, the driving part is located at the end of the slot and has a locking boss, and the locking boss has a locking block that can be engaged with the positioning groove of the lens pressure ring.

[0015] According to an embodiment of the second aspect of the present invention, a method for locking a pressure ring of a lens module is provided, using the above-mentioned jig for assembly, comprising the following steps: placing the lens at a corresponding position of the lens module body, placing the lens pressure ring at a corresponding position of the lens module body and then screwing it one to two turns, after the adsorption member sucks the center position of the lens, pressing the entire jig body toward the lens, so that the sleeve structure is sleeved outside the limited lens pressure ring for positioning and adjusting the drive part to engage with the positioning groove of the lens pressure ring, setting the maximum torque value of the electric screwdriver bit, and starting the electric screwdriver bit after docking the connecting part. When the electric screwdriver bit cannot drive the jig body to rotate, the assembly of the lens pressure ring and the lens module body is completed.

[0016] The above-mentioned lens module pressure ring locking method has at least the following beneficial effects: when the above-mentioned fixture and locking method are used to assemble and lock the lens, it can effectively prevent the lens from rotating, avoid the occurrence of ink loss on the lens when the lens pressure ring is tightened, and at the same time, greatly improve the assembly efficiency and finished product yield of the lens module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention Figure 1 ;

[0019] Figure 2is a structural cross-sectional view of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of an embodiment of the present invention Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the structure of an embodiment of the present invention Figure 3 ;

[0022] Figure 5 This is a schematic diagram of an assembly jig for assembling a lens module in an embodiment of the present invention. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of an assembly jig for assembling a lens module in an embodiment of the present invention. Figure 2 . DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] like Figure 5 and Figure 6As shown, a lens 520 and a lens pressing ring 510 are provided at the end of the lens module body 500. After the lens 520 is placed at the end of the lens module body 500, the lens 520 is pressed and fixed by the lens pressing ring 510.

[0029] Reference Figure 1 The embodiment of the present application provides a jig for assembling a lens module, specifically comprising a jig body 200, one end of which is detachably connected to a connecting portion 100 that can be adapted to a screwdriver bit, and the other end of which is provided with a sleeve structure for limiting a lens pressing ring 510, the sleeve structure being provided with a limiting assembly 400 and at least two driving parts 300, the driving part 300 being arranged on the sleeve structure, the driving part 300 being able to engage with a positioning groove 511 of the lens pressing ring 510, the limiting assembly 400 It is inserted at the central axis of the jig body 200, and the limiting assembly 400 can rotate with the central axis of the jig body 200 as the rotation center, that is, when the jig body 200 rotates, the limiting assembly 400 may not rotate with the jig body 200. Furthermore, the limiting assembly 400 includes a pre-tightening structure and an adsorption component 450. Under the action of the pre-tightening structure, the adsorption component 450 has a tendency to move in a direction away from the sleeve structure, wherein, under the action of external force, the adsorption component 450 can retract into the sleeve structure.

[0030] When using the above-mentioned jig to assemble the lens module, the adsorption part 450 is tightly sucked onto the lens 520 on the lens module body 500, and the jig body 200 is pressed toward the lens pressing ring 510 until the sleeve structure is set outside the lens pressing ring 510 and the driving part 300 is engaged with the positioning groove 511. After the above is completed, the electric screwdriver is docked with the connecting part 100, and the maximum torque is adjusted and then started. The electric screwdriver drives the jig body 200 to rotate through the connecting part 100, and the jig body 200 drives the lens pressing ring 510 through the engagement of the driving part 300 with the positioning groove 511. 10 rotation and tightening effectively ensures that the lens pressure ring 510 is evenly stressed and the tightening torque is qualified, avoiding deformation of the lens pressure ring 510 or the lens pressure ring 510 not being locked in place due to uneven force. Among them, when the lens pressure ring 510 rotates, because the limit assembly can rotate with the central axis of the jig body 200 as the rotation center, and the adsorption member 450 acts on the lens 520 with a certain pre-pressure, the lens 520 will not rotate with the lens pressure ring 510, that is, the lens 520 will not rub against the inner wall of the lens barrel to cause ink scraping. The entire jig has a simple structure and is easy to use, which can greatly improve the assembly efficiency and product yield of the lens module.

[0031] like Figure 2As shown, the pre-tightening structure includes a first connecting shaft 430 and an elastic member 440. The first connecting shaft 430 is inserted into the jig body 200. One end of the first connecting shaft 430 is connected to the jig body 200 through the limit assembly 400, so that the first connecting shaft 430 can rotate and perform linear reciprocating motion along the central axis direction of the jig body 200, so that when the adsorption member 450 sucks and presses against the lens 520, the jig body 200 drives the lens pressure ring 510 to rotate without driving the lens 520 to rotate. The other end of the first connecting shaft 430 is sleeved with the adsorption member 450, one end of the elastic member 440 presses against the jig body 200, and the other end presses against the first connecting shaft 430. The elastic member 440 acts on the first connecting shaft 430 with a certain pre-pressure, so that after the external force pressing against the adsorption member is released, under the action of the elastic member 440, the adsorption member 450 returns to its original position, and always has a tendency to move in the direction away from the sleeve structure, which is convenient for the alignment of the adsorption member 450 and the lens 520.

[0032] Furthermore, in this embodiment, the limiting assembly 400 includes a second connecting shaft 410 and a bearing 420. A movable groove 204 is provided in the middle of one end of the fixture body 200 connected to the connecting part 100, and the bearing 420 is fixed in the movable groove 204. Specifically, the bearing 420 is embedded in the movable groove 204, and one end of the second connecting shaft 410 has a limiting boss, and the other end is loosely matched with the inner ring of the bearing 420 and can be detachably connected to the first connecting shaft 430 that passes through the bottom of the movable groove 204. The second connecting shaft 410 is loosely matched with the inner ring of the bearing 420. On the one hand, the first connecting shaft 430 can rotate. On the other hand, the inner ring of the bearing also plays a guiding role, so that the first connecting shaft 430 can reciprocate up and down. The limiting boss also serves to limit the range of linear reciprocating motion of the first connecting shaft 430. It should be noted that one end of the first connecting shaft 430 is provided with an external thread, and the second connecting shaft 410 is provided with a screw hole that matches the external thread, which facilitates the assembly of the first connecting shaft 430 and the second connecting shaft 410, and also facilitates the adjustment of the length of the first connecting shaft 430 extending out of the sleeve structure, which is convenient for adapting to the assembly of different lens modules. The connecting part 100 is fixedly connected to the fixture body 200 by screws. If the connecting part 100 is broken, it is convenient for disassembly and assembly. Specifically, the upper part of the connecting part 100 is prism-shaped, and there is an arc-shaped bayonet on the prism for connecting to an electric torque screw. The torque screw can accurately control the applied torque value. The lower part is an oblate cylinder 110 with four through holes on it, which is connected to the fixture body 200 by screws.

[0033] In some embodiments, the elastic member 440 is preferably a spring. Of course, the elastic member 440 can also be a spring. Figure 2As shown, a countersunk hole 205 is provided in the middle of the sleeve structure, the countersunk hole 205 is connected to the movable groove 204, the first connecting shaft 430 is provided with a limiting portion 431, and the spring is sleeved on the first connecting shaft 430. After one end of the first connecting shaft 430 passes through the countersunk hole 205 and the movable groove 204 in sequence and is threadedly connected to the second connecting shaft 410, one end of the spring abuts against the bottom of the countersunk hole 205, and the other end abuts against the limiting portion 431, so that the first connecting shaft 430 has a tendency to move in a direction away from the sleeve structure.

[0034] In addition, the adsorption part 450 is preferably a vacuum suction cup made of silicone, which will not damage the lens 520. The end of the first connecting shaft 430 has a convex edge for the vacuum suction cup to be clamped, which makes it convenient to select vacuum suction cups of different specifications according to different lenses 520.

[0035] like Figure 3 and Figure 4 As shown, the sleeve structure includes a first enclosure 203 and a second enclosure 201. The first enclosure 203 is arranged around the outer edge of the end of the jig body 200, and the lens pressure ring 510 can be inserted into the first enclosure 203. The second enclosure 201 is arranged around the end of the jig body 200 and fits the inner wall of the first enclosure 203 to form a step for limiting the lens pressure ring 510. The setting of the sleeve structure avoids the deviation of the lens pressure ring 510 when rotating and tightening, thereby improving the stability of the jig during assembly.

[0036] Furthermore, the driving part 300 is connected to the jig body 200 by bolts. The driving part 300 is distributed in a circular array with the central axis of the jig body 200 as the center. The evenly arranged driving part 300 is conducive to uniform force on the lens pressure ring 510, and one end of the driving part 300 is positioned in the card slot 202 adapted and provided on the sleeve structure, and the other end extends toward the central axis direction of the jig body 200. On the one hand, the card slot 202 strengthens the rigidity of the driving part 300 to avoid the displacement of the driving part 300 during long-term use. On the other hand, it also plays a role in positioning the driving part 300. It should be noted that the number and position of the card slot 202 correspond to the setting of the driving part 300.

[0037] Among them, the slot 202 passes through the first enclosure 203 and the second enclosure 201, and the driving part 300 is located at the end of the slot 202 with a locking boss 310, and the locking boss 310 has a locking block 320 that can be engaged with the positioning groove 511 of the lens pressure ring 510. The locking boss 310 protrudes from the surface of the driving part 300, so that the lens pressure ring 510 can be avoided between the driving part 300 and the locking boss 310, and the locking block 320 is used to engage with the positioning groove 511 to realize transmission, so as to facilitate the screwing of the lens pressure ring 510.

[0038] The embodiment of the present application also provides a method for locking the pressure ring of the lens module using the above-mentioned fixture, such as Figure 5 and Figure 6 As shown, during assembly, the lens 520 is placed in the corresponding position of the lens module body 500, and the lens pressure ring 510 is placed in the corresponding position of the lens module body 500 and then screwed one to two turns to pre-tighten and prevent the lens pressure ring from being mispositioned during adjustment. After the adsorption member 450 sucks the center position of the lens 520, the entire jig body 200 is pressed toward the lens 520, so that the sleeve structure is placed outside the limited lens pressure ring 510 for limiting the position and the driving part 300 is adjusted to engage with the positioning groove 511 of the lens pressure ring 510. At this time, the adsorption member 450 acts on the lens 520 with a certain pre-pressure, and the maximum torque value of the electric screwdriver bit is set. The electric screwdriver bit is started after docking with the connecting part 100. When the electric screwdriver bit cannot drive the jig body 200 to rotate, the assembly of the lens pressure ring 510 and the lens module body 500 is completed. The entire operation process is simple, and when the above-mentioned fixture and locking method are used to assemble and lock the lens module, it can effectively prevent the lens 520 from rotating, and avoid the occurrence of ink loss on the lens 520 when the lens pressure ring 510 is tightened. At the same time, it greatly improves the assembly efficiency and finished product yield of the lens module.

[0039] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A jig for assembly, characterized in that: The invention comprises a fixture body (200), one end of which is detachably connected to a connecting portion (100) capable of being adapted to a screwdriver bit, and the other end of which is provided with a sleeve structure for limiting a lens pressing ring (510), the sleeve structure being provided with a limiting assembly (400) and at least two driving portions (300), the driving portions (300) being arranged on the sleeve structure, the driving portions (300) being capable of engaging with a positioning groove (511) of the lens pressing ring (510), the limiting assembly (400) and at least two driving portions (300), the driving portions (300) being arranged on the sleeve structure, The position limiting component (400) is inserted into the central axis of the jig body (200), and the position limiting component (400) can rotate with the central axis of the jig body (200) as the rotation center. The position limiting component (400) includes a pre-tightening structure and an adsorption component (450). The adsorption component (450) has a tendency to move in a direction away from the sleeve structure under the action of the pre-tightening structure, wherein, under the action of an external force, the adsorption component (450) can retract into the sleeve structure.

2. The assembly jig according to claim 1, wherein: The pre-tightening structure comprises a first connecting shaft (430) and an elastic member (440), wherein the first connecting shaft (430) is inserted into the jig body (200), and one end of the first connecting shaft (430) is connected to the jig body (200) via a limiting assembly (400) so that the first connecting shaft (430) can rotate and perform linear reciprocating motion along the central axis direction of the jig body (200), and the other end of the first connecting shaft (430) is sleeved with the adsorption member (450), and one end of the elastic member (440) is pressed against the jig body (200), and the other end is pressed against the first connecting shaft (430).

3. The assembly jig according to claim 2, wherein: The limiting assembly (400) includes a second connecting shaft (410) and a bearing (420), a movable groove (204) is provided in the middle of one end of the fixture body (200) connected to the connecting portion (100), and the bearing (420) is fixed to the movable groove (204), one end of the second connecting shaft (410) has a limiting boss, and the other end is detachably connected to the first connecting shaft (430) that passes through the bottom of the movable groove (204) after being clearance-fitted with the inner ring of the bearing (420).

4. The assembly jig according to claim 3, wherein: One end of the first connecting shaft (430) is provided with an external thread, the second connecting shaft (410) is provided with a screw hole matching the external thread, and the connecting portion (100) is fixedly connected to the fixture body (200) by means of screws.

5. The assembly jig according to claim 3, wherein: The elastic member (440) is a spring, a countersunk hole (205) is provided in the middle of the sleeve structure, the countersunk hole (205) is connected to the movable groove (204), the first connecting shaft (430) is provided with a limiting portion (431), and the spring is sleeved on the first connecting shaft (430). After one end of the first connecting shaft (430) passes through the countersunk hole (205) and the movable groove (204) in sequence to connect to the second connecting shaft (410), one end of the spring abuts against the bottom of the countersunk hole (205), and the other end abuts against the limiting portion (431).

6. The assembly jig according to claim 2, wherein: The adsorption member (450) is a vacuum suction cup, and the end of the first connecting shaft (430) has a convex edge for the vacuum suction cup to be clamped.

7. The assembly jig according to claim 1, wherein: The sleeve structure comprises a first enclosure (203) and a second enclosure (201), wherein the first enclosure (203) is arranged around the outer edge of the end of the jig body (200), and the second enclosure (201) is arranged around the end of the jig body (200) and fits the inner wall of the first enclosure (203) to form a step for limiting the lens pressing ring (510).

8. The assembly jig according to claim 7, wherein: The driving portion (300) is connected to the fixture body (200) via bolts. The driving portion (300) is distributed in a circular array with the central axis of the fixture body (200) as the center. One end of the driving portion (300) is positioned in a slot (202) adapted to be provided on the sleeve structure, and the other end extends toward the central axis of the fixture body (200).

9. The assembly jig according to claim 8, wherein: The card slot (202) passes through the first enclosure (203) and the second enclosure (201); the driving portion (300) is located at the end of the card slot (202) and has a locking boss (310); the locking boss (310) has a locking block (320) capable of locking with a positioning groove (511) of a lens pressing ring (510).

10. A method for locking a pressure ring of a lens module, using the assembly jig according to any one of claims 1 to 9, characterized in that: The invention comprises the following steps: placing the lens (520) at a corresponding position of the lens module body (500), placing the lens pressure ring (510) at a corresponding position of the lens module body (500) and then screwing it one to two turns; after the adsorption member (450) sucks the center position of the lens (520), the entire fixture body (200) is pressed toward the lens (520), so that the sleeve structure is sleeved outside the limited lens pressure ring (510) for limiting, and the driving part (300) is adjusted to engage with the positioning groove (511) of the lens pressure ring (510); setting the maximum torque value of the electric screwdriver bit, docking the electric screwdriver bit with the connecting part (100) and starting it; when the electric screwdriver bit cannot drive the fixture body (200) to rotate, the lens pressure ring (510) and the lens module body (500) are assembled.

Images