Lens pulling force detection tool

Abstract

The utility model provides a lens pulling force detection tool, which relates to the technical field of lens assembling and testing and comprises a sleeve and a lens carrying table, an annular cover plate is fixedly arranged at the upper end of the sleeve, a boss is arranged in the middle of the sleeve, the interior of the sleeve is divided into an upper cavity and a lower cavity, and the lens carrying table is used for placing a lens and detachably installed on the boss. The outer side wall is embedded with the inner side wall of the upper cavity, and the inner side wall is embedded with the outer wall of a lens frame of the lens; the device further comprises a force measuring device which is assembled in the lower cavity, a top block is arranged on the force measuring device, and the top block extends upwards to be provided with a stand column which is used for jacking a lens of the lens. The device is accurate in lens positioning, high in detection efficiency, capable of accurately measuring the pulling force of the lens, simple in structure, low in cost and high in reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to lens assembly test technical field especially relates to a lens pullout force detection fixture. BACKGROUND

[0002] In the lens assembly test technical field, the detection of pullout force is the key link to ensure the quality of lens assembly. The existing pullout force measurement method is to put the lens / separation ring into the lens frame, and then hold the lens to resist the force block, and then the lens / separation ring is pushed out. When operating, the lens is not stable and is easy to deviate, resulting in inaccurate measurement data. On the other hand, the pullout force application direction is difficult to keep perpendicular to the lens axis, which affects the reliability of the detection result. Therefore, a compact structure, convenient operation and high measurement accuracy lens pullout force detection device is urgently needed. SUMMARY

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a lens pullout force detection fixture, which adopts the following technical scheme:

[0004] A lens pullout force detection fixture, comprising

[0005] A sleeve, the middle part of the sleeve is provided with a boss, the inner part of the sleeve is divided into an upper cavity and a lower cavity,

[0006] A lens loading platform for placing a lens, the lens loading platform is detachably mounted on the boss, and the outer side wall is fitted with the inner side wall of the upper cavity, and the inner side wall is fitted with the outer wall of the lens frame of the lens.

[0007] A force measuring device assembled in the lower cavity, the force measuring device is provided with a top block, the top block is provided with a column extending upward, and the lens is held by the column.

[0008] Further improved, the upper end of the sleeve is fixedly provided with a ring-shaped cover plate, the lens loading platform is arranged between the ring-shaped cover plate and the boss, and is embedded in the upper cavity in an up-and-down movable manner, a plurality of elastic return members are arranged on the boss to move the lens loading platform upward

[0009] Further improved, the middle part of the lens loading platform is provided with a clearance slot and a through hole from top to bottom, the connection between the clearance slot and the through hole forms a step surface, the lens frame abuts against the step surface, and the column passes through the through hole to hold the lens when the lens is pressed down.

[0010] Further improved, the side wall of the top block is fitted with the side wall of the lower cavity.

[0011] Further improved, the force measuring device comprises a force sensor, which is arranged inside the lower cavity and connected to a digital display outside the sleeve through a wire.

[0012] Further improved, the side wall of the lower cavity is provided with a wire slot for passing the wire.

[0013] Further improved, the force sensor is provided with a first limiting hole, and the top block is provided with a second limiting hole matched with the first limiting hole.

[0014] Further improved, the top block is fixed to the force sensor through a positioning pin passing through the second limiting hole and the first limiting hole.

[0015] Further improved, the boss is provided with a plurality of grooves for accommodating the elastic reset member.

[0016] Further improved, the elastic reset member is a compression spring.

[0017] Further improved, the annular cover plate is fixed to the top of the sleeve through a bolt.

[0018] Compared with the prior art, the force measuring device has the following advantages:

[0019] Firstly, the sleeve is divided into an upper cavity and a lower cavity by a boss, the upper cavity is used for accommodating a lens carrier, the sleeve, the lens carrier and the lens are embedded, the rapid positioning and stable fixing of the lens are realized, and the lens is prevented from being deviated during the pulling force detection. Further, the lens carrier moves up and down between the annular cover plate and the boss, and the boss is provided with a spring, the lens carrier is upwardly held and reset, and batch lens detection or adaptive detection assembly line is facilitated.

[0020] Secondly, the force sensor is arranged in the lower cavity, the top block is arranged on the force sensor, and a column on the top block passes through a through hole to hold the lens, the force applied in the process is reflected to the force sensor, the force sensor is connected to a digital display through a wire, and the pressure value is displayed, so that the manual reading error is avoided.

[0021] Thirdly, the top block and the force sensor are fixed through a positioning pin, the top block is embedded with the inner wall of the lower cavity, the lateral deviation of the top block and the force sensor is limited, the column and the through hole are centered, the stability during long-term use is ensured, the stable structure is helpful to reduce mechanical wear, on the other hand, the pulling force direction is consistent with the lens axis, and the measurement accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 It is a schematic view of the overall structure of the present application.

[0024] Figure 2 It is a side sectional view of the present application.

[0025] Figure 3 It is a schematic view of the explosion structure of the present application.

[0026] Reference signs:

[0027] 1-sleeve; 2-lens carrier; 3-ring cover plate; 4-elastic reset member; 5-top block; 6-force sensor; 7-positioning nail;

[0028] 1a-upper cavity; 1b-lower cavity; 11-boss; 12-wire slot; 13-groove;

[0029] 21-give way slot; 22-through hole; 23-step surface;

[0030] 51-stand; 52-second limiting hole;

[0031] 61-wire; 62-first limiting hole;

[0032] 800-lens; 801-lens frame; 802-lens. DETAILED DESCRIPTION

[0033] In order to facilitate those skilled in the art to understand, the structure of the present application will be further described in combination with the drawings:

[0034] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. The terms "part", "side", "end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application to a specific orientation, structure and operation, and therefore cannot be understood as limiting the present application.

[0035] As Figures 1-2As shown, this application provides a lens pulling force testing fixture, including a sleeve 1 and a lens stage 2. A boss 11 is provided in the middle of the sleeve 1, which divides the interior of the sleeve 1 into an upper cavity 1a and a lower cavity 1b.

[0036] like Figure 2 As shown, the lens stage 2 is used to place the lens 800. The lens 800 includes a lens frame 801 and a lens element 802. The lens element 802 is detachably fixed to the end of the lens frame 801.

[0037] Furthermore, such as Figure 2 As shown, the lens 802 platform is detachably mounted on the aforementioned boss 11, and its outer side wall is fitted with the inner side wall of the upper cavity 1a. The inner side wall is fitted with the outer wall of the lens frame 801 of the lens 800, thereby achieving rapid positioning and stable fixation of the lens 800 and preventing the lens 800 from shifting during the pull-out force test.

[0038] Continue to refer to Figure 2 It also includes a force measuring device, which is mounted in the lower cavity 1b. A top block 5 is provided on the top block 5, and a column 51 extends upward from the top block 5. The column 51 is used to hold the lens 802, so that the lens 802 is separated from the lens frame 801. When the lens 800 is pressed down, the lens 800 moves vertically downward under the limitation of the inner side wall of the lens stage 2. The column 51 holds the lens 802, so that the lens 802 is separated from the lens frame 801. The force generated in this process that separates the lens 802 from the lens frame 801 is the pull-out force of the lens 800, which is an important detection parameter reflecting the assembly quality of the lens 800. The pull-out force is reflected on the force measuring device through the top block 5, and the specific value of the pull-out force is measured as the detection parameter of the lens 800.

[0039] like Figure 2 and Figure 3As shown, the upper end of the sleeve 1 is further fixed with a ring cover plate 3, the lens carrier 2 is arranged between the ring cover plate 3 and the boss 11, and can be embedded in the inside of the upper cavity 1a and move up and down, and a plurality of elastic return members 4, preferably compression springs, are arranged between the boss 11 and the lens carrier 2, for resetting the lens carrier 2 to move upward. Further, the middle part of the lens carrier 2 is provided with a clearance groove 21 and a through hole 22 from top to bottom, and the connection part of the clearance groove 21 and the through hole 22 forms a step surface 23, the lens 800 is placed on the step surface 23, one end surface of the lens frame 801 abuts against the step surface 23, and the lens 802 is at the side end surface. When the lens 800 is pressed down, the elastic return member 4 is compressed under force, the lens carrier 2 moves downward against the action of the elastic return member 4, the column 51 holds the lens 802 through the through hole 22, so that the lens 802 is separated from the lens frame 801. Through the above structure, after the test of one lens 800 is completed, the lens carrier 2 can be quickly reset under the action of the elastic return member 4, and the next lens 800 to be tested can be placed on the lens carrier 2 in the same way for testing, reducing manual intervention, improving detection efficiency, facilitating batch lens 800 detection, and can also be combined with a mechanical arm for assembly line detection.

[0040] As preferred, as Figure 3 shown, the ring cover plate 3 is fixedly connected to the top of the sleeve 1 by bolts, the inner diameter of the ring cover plate 3 is smaller than the inner diameter of the sleeve 1, that is, the ring cover plate 3 extends inwardly relative to the inner diameter of the sleeve 1 to form a blocking area, and the lens 802 carrier is limited between the blocking area and the boss 11. The boss 11 is provided with a plurality of grooves 13, and the elastic return members 4 are assembled in the grooves 13 to prevent misplacement of the elastic return members 4 caused by frequent pressing, thereby affecting the normal resetting of the lens 802 carrier.

[0041] As shown in Figure 2 , the side wall of the top block 5 is embedded with the side wall of the lower cavity 1b, and the stability of the top block 5 when holding the lens 802 can be further improved by limiting the side wall of the lower cavity 1b.

[0042] In one specific embodiment, the force measuring device described above comprises a force sensor 6, which is arranged in the inside of the lower cavity 1b and connected to a digital display (not shown in the figure) outside the sleeve 1 through a wire 61, and the digital display displays the pressure value, that is, the pulling force value of the lens 802. In addition, a processing module (not shown in the figure) can be further connected to record or process the measured data.

[0043] In the above embodiment, as Figure 1 shown, the side wall of the lower cavity 1b is provided with a wire groove 12 for passing the wire 61, so as to facilitate the connection between the internal force sensor 6 and the external equipment.

[0044] As Figures 2-3As shown, the force sensor 6 is provided with a first limiting hole 62, and the top block 5 is provided with a second limiting hole 52 matched with the first limiting hole 62; further comprising a positioning pin 7, the positioning pin 7 passes through the second limiting hole 52 and the first limiting hole 62 in sequence, and fixes the top block 5 on the force sensor 6. The above structure aims to limit the lateral deviation between the force sensor 6 and the top block 5, and prevent the measurement from being inaccurate due to the deviation of the pulling force and the force direction of the force sensor 6. In another embodiment, the first limiting hole 62 can also be a threaded hole, and the positioning pin 7 is a bolt.

[0045] The preferred embodiments of the utility model have been described above, and are not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A lens pull force detection jig, characterized by, The utility model relates to a lens testing device, including The sleeve (1) is provided with a boss (11) in the middle, and the inside of the sleeve (1) is divided into an upper cavity (1a) and a lower cavity (1b); The lens carrier (2) is used for placing a lens (800), and the lens carrier (2) is detachably mounted on the boss (11), and the outer side wall is embedded with the inner side wall of the upper cavity (1a), and the inner side wall is embedded with the outer wall of the lens frame (801) of the lens (800); The force measuring device is assembled in the lower cavity (1b), and the top block (5) is provided on the force measuring device, and the vertical column (51) is provided upwards for supporting the lens (800).

2. The lens extraction force detection jig according to claim 1, wherein The upper end of the sleeve (1) is fixedly provided with a ring-shaped cover plate (3), the lens carrier (2) is arranged between the ring-shaped cover plate (3) and the boss (11), and can be embedded in the upper cavity (1a) and can be embedded in the upper cavity (1a), a plurality of elastic return members (4) are arranged between the boss (11) and the lens carrier (2) to make the lens carrier (2) move upwards.

3. The lens extraction force detection jig according to claim 2, wherein The middle part of the lens carrier (2) is provided with a displacement slot (21) and a through hole (22) from top to bottom, the connection part of the displacement slot (21) and the through hole (22) forms a step surface (23), the lens frame (801) abuts against the step surface (23), and when the lens (800) is pressed down, the vertical column (51) passes through the through hole (22) to support the lens (802).

4. The lens extraction force detection apparatus according to claim 1, wherein The side wall of the top block (5) is embedded with the side wall of the lower cavity (1b).

5. The lens extraction force detection apparatus according to claim 1, wherein The force measuring device comprises a force sensor (6), and the force sensor (6) is arranged in the lower cavity (1b) and connected with a digital display device outside the sleeve (1) through a wire (61).

6. The lens extraction force detection jig according to claim 5, wherein The side wall of the lower cavity (1b) is provided with a wire groove (12) for penetrating the wire (61).

7. The lens extraction force detection apparatus according to claim 5, wherein The force sensor (6) is provided with a first limiting hole (62), and the top block (5) is provided with a second limiting hole (52) matched therewith; Further comprising a positioning nail (7), the positioning nail (7) penetrates the second limiting hole (52) and the first limiting hole (62) in sequence, and the top block (5) is fixed on the force sensor (6).

8. The lens extraction force detection apparatus according to claim 2, wherein The boss (11) is provided with a plurality of grooves (13) for accommodating the elastic return members (4).

9. The lens extraction force detection apparatus according to claim 2, wherein The elastic return member (4) is a compression spring.

10. The lens extraction force detection apparatus according to claim 2, wherein The ring-shaped cover plate (3) is fixedly arranged on the top of the sleeve (1) through bolts.

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