Core fixing jig

Abstract

The invention provides a core fixing jig which is used for clamping and fixing a lens mold core and comprises a base, a core fixing seat, an elastic clamping jaw and a locking cover. The core fixing seat is arranged on the base and comprises a containing through hole and a supporting platform located in the containing through hole; the elastic clamping jaw is of an annular structure, a center hole is formed in the middle of the elastic clamping jaw, the elastic clamping jaw abuts against the supporting platform and is arranged in the containing through hole, and the elastic clamping jaw is used for clamping the lens mold core placed in the center hole; the locking cover is arranged on the supporting platform, the locking cover comprises an avoiding hole, the elastic clamping jaw is partially located in the avoiding hole and abuts against the locking cover, and the locking cover is used for extruding the elastic clamping jaw to clamp the lens mold core. The lens mold core is installed and fixed through the elastic clamping jaw, the installation precision and installation convenience are improved, it is guaranteed that the outer side of the lens mold core is evenly stressed, installation inclination of the lens mold core is prevented, and the installation deviation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lens mold core processing, in particular to a core fixing fixture. Background Art

[0002] At present, the production of aspheric lenses usually adopts die casting. In order to form an aspheric lens, the end face of the mold core must also be processed into an aspheric surface. During the mold core processing process, the mold core is generally placed on a centering fixture, and then the mold core is surface processed.

[0003] The existing core fixing jig mainly uses adhesive to position the mold core to fix the mold core in the center of the core fixing jig. However, the mold core cannot be fixed in the center by adhesive bonding, and it takes a long time to adjust the position of the mold core. The presence of glue will cause the mold core to be placed inaccurately, and the glue positioning is not reliable. In addition, the glue needs to be removed when replacing the new mold core later, which seriously affects the processing efficiency and convenience. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a centering jig to improve the installation accuracy and convenience of the lens mold.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a centering fixture for clamping and fixing a lens mold core, comprising a base, a centering seat, an elastic clamping claw and a locking cover;

[0007] The core fixing seat is arranged on the base, and the core fixing seat comprises a receiving through hole and a supporting platform located in the receiving through hole;

[0008] The elastic clamp is an annular structure with a central hole in the middle, the elastic clamp rests on the support platform and is arranged in the accommodating through hole, and the elastic clamp is used to clamp the lens mold placed in the central hole;

[0009] The locking cover is arranged on the supporting platform, the locking cover comprises an avoidance hole, and the elastic clamping claw is partially located in the avoidance hole and abuts against the locking cover, and the locking cover is used to squeeze the elastic clamping claw to clamp the lens mold core.

[0010] Further preferably, a boss is provided on the base, and the boss is located in the accommodating through hole and is used to support the lens mold core.

[0011] Further preferably, the locking cover is connected to the core fixing seat via threads, an outer peripheral side of the locking cover is provided with an external thread, and the core fixing seat is located above the supporting platform and is provided with an internal thread matching the external thread.

[0012] Further preferably, a plurality of wrench grooves are provided on the surface of the locking cover.

[0013] Further preferably, an upper inclined surface and a lower inclined surface connected at an angle are provided on the outer peripheral side of the elastic clamp, a first inclined surface supporting the upper inclined surface is provided on the locking cover at the avoidance hole, and a second inclined surface supporting the lower inclined surface is provided on the support platform.

[0014] Further preferably, the elastic clamping jaw further comprises:

[0015] A plurality of inner side walls, the plurality of inner side walls are spaced apart and surround the central hole to form the central hole, and the central hole has a central axis;

[0016] A plurality of outer side walls are arranged on a side of the inner side wall away from the central axis, the plurality of outer side walls are spaced apart around the central axis, and the outer side walls and the inner side walls are staggered with each other in a direction perpendicular to the central axis;

[0017] A plurality of connecting walls, wherein the plurality of connecting walls are spaced apart and distributed around the central axis, and two ends of the connecting walls are respectively connected to the inner wall and the outer wall;

[0018] A plurality of first gaps, wherein the first gaps are formed by two adjacent connecting walls and one outer side wall, and the first gaps are open toward the central axis;

[0019] A plurality of second gaps are provided, wherein the second gaps are formed by two adjacent connecting walls and one inner wall, and the second gaps are open away from the central axis.

[0020] Further preferably, both the first gap and the second gap penetrate the elastic clamping claw in the direction of the central axis.

[0021] Further preferably, the width of the first gap is 0.1 mm to 0.4 mm.

[0022] Further preferably, the width of the second gap is 0.05 mm to 0.2 mm.

[0023] Further preferably, the base is connected to the fixed core seat by bolts.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention installs and fixes the lens mold core through the elastic clamping claws, thereby improving the installation accuracy and installation convenience of the lens mold core, and compared with the existing adhesive lens mold core, it can avoid the lens mold core being contaminated by glue; at the same time, the support platform of the locking cover and the fixed core seat cooperates with the limiting extrusion elastic clamping claw to ensure the overall deformation of the elastic clamping claw is consistent, that is, to ensure that the outer side of the lens mold core is evenly stressed, prevent the lens mold core from being tilted during installation, and reduce installation deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 for Figure 1 Middle AB section view;

[0029] Figure 3 An exploded view of the present invention;

[0030] Figure 4 for Figure 1 Middle AC section view;

[0031] Figure 5 for Figure 4 The enlarged schematic diagram at H in the middle;

[0032] Figure 6 It is a schematic diagram of the structure of the elastic clamp in the present invention.

[0033] Illustrations: 1-lens mold; 2-elastic clamping claw, OO-center axis, 201-center hole, 202-upper inclined surface, 203-lower inclined surface, 204-inner wall, 205-outer wall, 206-connecting wall, 207-first gap, 208-second gap; 3-locking cover, 301-avoidance hole, 302-wrench groove, 303-first inclined surface; 4-centering seat, 401-support platform, 402-accommodating through hole, 403-second inclined surface; 5-base, 501-boss.

[0034] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0035] In order to better understand the present invention, a more detailed description of various aspects of the present invention will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of embodiments of the present invention, and are not intended to limit the scope of the present invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which 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 operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0037] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present invention, "may" is used to mean "one or more embodiments of the present invention". And, the term "exemplary" is intended to refer to an example or illustration.

[0038] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] like Figures 1 to 4As shown, the present invention provides a core fixing jig for processing a lens mold 1, comprising a base 5, a core fixing seat 4, an elastic clamping claw 2 and a locking cover 3. The core fixing seat 4 is arranged on the base 5, and the core fixing seat 4 comprises a receiving through hole 402 and a supporting platform 401 located in the receiving through hole 402. The elastic clamping claw 2 is an annular structure and has a center hole 201 in the middle. The elastic clamping claw 2 abuts against the supporting platform 401 and is arranged in the receiving through hole 402. The elastic clamping claw 2 is used to clamp the lens mold 1 placed in the center hole 201. The locking cover 3 is arranged on the supporting platform 401, and the locking cover 3 comprises an avoidance hole 301, and the elastic clamping claw 2 is partially located in the avoidance hole 301 and abuts against the locking cover 3. The locking cover 3 is used to squeeze the elastic clamping claw 2 to clamp the lens mold 1. The base 5 is connected to the core fixing seat 4 by bolts to ensure that the base 5 and the core fixing seat 4 are connected simply and stably. By installing and fixing the lens mold 1 through the elastic clamping claw 2, the installation accuracy and convenience of the lens mold 1 can be improved, and compared with the existing adhesive lens mold 1, the lens mold 1 can be prevented from being contaminated by glue; at the same time, the supporting platform 401 of the locking cover 3 and the fixed core seat 4 cooperates with the limiting extrusion of the elastic clamping claw 2 to ensure that the overall deformation of the elastic clamping claw 2 is consistent, that is, the outer side of the lens mold 1 is ensured to be evenly stressed, thereby preventing the lens mold 1 from being tilted during installation and reducing installation deviation.

[0041] More specifically, the base 5 is provided with a boss 501, which is located in the receiving through hole 402 and is used to support the lens mold 1. When installing the lens mold 1, it can play a preliminary positioning role, improve the uniformity of the contact between the peripheral side of the lens mold 1 and the elastic clamping claw 2, and at the same time reduce the contact area of ​​the base 5 on the lens mold 1 to avoid scratching the lens mold 1. It should be noted that the top surface of the boss 501 is formed through ultra-precision processing, serving as a reference surface for installing the lens mold 1, thereby ensuring the installation accuracy of the lens mold 1.

[0042] In order to improve the installation accuracy, the locking cover 3 and the core seat 4 are connected by threads, the outer peripheral side of the locking cover 3 is provided with external threads, and the core seat 4 is provided with internal threads that match the external threads above the support platform 401. The locking cover 3 and the core seat 4 are installed and fixed by using the internal and external threads, which reduces the installation difficulty, and the threaded connection can ensure the position accuracy of the two.

[0043] In order to facilitate the installation of the lock cover 3, a plurality of wrench grooves 302 are provided on the surface of the lock cover 3. The wrench grooves 302 are used to drive the lock cover 3 to rotate, thereby tightening the lock cover 3 and the fixed core seat 4, and the operation is simple and convenient.

[0044] like Figure 5As shown, the outer peripheral side of the elastic clamp 2 is provided with an upper inclined surface 202 and a lower inclined surface 203 connected at an angle, the lock cover 3 is provided with a first inclined surface 303 that bears against the upper inclined surface 202 at the avoidance hole 301, and the support platform 401 is provided with a second inclined surface 403 that bears against the lower inclined surface 203. The lower inclined surface 203 and the second inclined surface 403 bear against each other, which can ensure that the elastic clamp 2 is accurately installed on the support platform 401 of the core seat 4, and the installation is foolproof; the upper bevel and the first inclined surface 303 bear against each other, which can ensure that the lock cover 3 and the elastic clamp 2 are accurately matched and contacted; and the upper inclined surface 202, the lower inclined surface 203, the first inclined surface 303 and the second inclined surface 403 cooperate as a whole, so that the outer side of the elastic clamp 2 is evenly stressed, that is, the elastic clamp 2 is evenly deformed and will not tilt, thereby improving the installation accuracy of the lens mold 1.

[0045] It should be noted that when the locking cover 3 provides the elastic clamping claw 2 with a squeezing force, the squeezing force on the upper inclined surface 202 can be decomposed into a direction along the central axis OO and a direction perpendicular to the central axis OO. The decomposed force along the central axis OO can drive the lens mold 1 to move downward, and then tightly abut the lens mold 1 against the boss 501 of the base 5, that is, the bottom surface of the lens mold 1 fits the top surface of the boss 501. The top surface of the boss 501 is formed by ultra-precision processing, thereby ensuring the installation accuracy of the lens mold 1.

[0046] like Figure 6 As shown, the elastic clamp 2 further includes: a plurality of inner side walls 204, the plurality of inner side walls 204 are spaced apart and surround the central hole 201, and the central hole 201 has a central axis OO;

[0047] A plurality of outer side walls 205 are arranged on a side of the inner side wall 204 away from the central axis OO, the plurality of outer side walls 205 are spaced apart around the central axis OO, and the outer side walls 205 and the inner side wall 204 are staggered with each other in a direction perpendicular to the central axis OO;

[0048] A plurality of connecting walls 206, the plurality of connecting walls 206 are spaced apart around the central axis OO, and the two ends of the connecting wall 206 are respectively connected to the inner wall 204 and the outer wall 205;

[0049] A plurality of first gaps 207, wherein the first gaps 207 are formed by two adjacent connecting walls 206 and an outer side wall 205, and the first gaps 207 are open toward the central axis OO;

[0050] A plurality of second gaps 208 are formed by enclosing two adjacent connecting walls 206 and an inner side wall 204, and the second gaps 208 are open away from the central axis OO. It is understandable that the first gap 207 and the second gap 208 open in opposite directions. A plurality of first gaps 207 and a plurality of second gaps 208 are formed by a plurality of inner side walls 204, a plurality of outer side walls 205 and a plurality of connecting walls 206. The inner side walls 204 can be compressed on the first gaps 207, and the outer side walls 205 can be compressed on the second gaps 208, thereby compressing the elastic clamps and squeezing and fixing the mold core. It should be noted that the center hole 201 is used to install and place the mold core. The inner side walls 204 and the outer side walls 205 are arranged in a staggered interval in the direction perpendicular to the central axis OO (radial direction), making full use of the space in the direction perpendicular to the central axis OO, reducing the superposition of the elastic clamps 2 in the axial space, reducing the thickness of the elastic clamps 2, and meeting the requirements of miniaturization design. Compared with the prior art, the connection structure of the inner wall 204 or the outer wall 205 in the direction of the central axis OO is removed, and the connecting wall 206 is used to connect the inner wall 204 and the outer wall 205 in the direction perpendicular to the central axis OO, thereby reducing the thickness of the elastic clamp 2.

[0051] The first gap 207 and the second gap 208 both penetrate the elastic clamping jaw 2 in the direction of the central axis OO, ensuring that the connecting wall 206 can be better deformed in the direction around the central axis OO, so that the elastic clamping jaw 2 can be better deformed to clamp the lens mold core 1.

[0052] More specifically, the width of the first gap 207 is 0.1 mm to 0.4 mm, and the width of the second gap 208 is 0.05 mm to 0.2 mm, so that the connecting wall 206 has a sufficient deformation range to ensure that the elastic clamping jaws 2 squeeze the lens mold core 1, so that the elastic clamping jaws 2 can better deform and clamp the lens mold core 1.

[0053] It should be noted that the elastic clamp 2 includes but is not limited to the specific solution provided in the present application, and may also be a structure such as an elastic spacer or elastic collar with relatively good deformation performance, as long as it is an elastic part that can be deformed under force to achieve extrusion of the lens mold core.

[0054] When in use, the core seat 4 is locked on the base 5 by bolts, and then the lens mold 1 is placed on the boss 501 of the base 5, the elastic clamping claw 2 is placed on the supporting platform 401 of the core seat 4 and it is ensured that the lower inclined surface 203 of the elastic clamping claw 2 and the second inclined surface 403 of the supporting platform 401 are supported by each other, and the lens mold 1 is arranged in the center hole 201 of the elastic clamping claw 2; the avoidance hole 301 of the locking cover 3 is aligned with the elastic clamping claw 2, and it is ensured that the first inclined surface 303 of the locking cover 3 and the upper inclined surface 202 of the elastic clamping claw 2 are supported by each other; the wrench is inserted into the wrench groove 302 of the locking cover 3, and the locking cover 3 is twisted around the avoidance hole 301. The external thread on the outer peripheral side of the locking cover 3 cooperates with the internal thread on the core seat 4, so that the locking cover 3 moves toward the supporting platform 401, that is, the locking cover 3 and the supporting platform 401 cooperate to squeeze the elastic clamping claw 2, thereby realizing the clamping and positioning of the lens mold 1.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A centering jig for clamping and fixing a lens mold (1), characterized in that: It comprises an elastic clamping claw (2), a locking cover (3), a core fixing seat (4) and a base (5); The core fixing seat (4) is arranged on the base (5), and the core fixing seat (4) comprises a receiving through hole (402) and a supporting platform (401) located in the receiving through hole (402); The elastic clamp (2) is an annular structure with a central hole (201) in the middle, the elastic clamp (2) abuts against the supporting platform (401) and is arranged in the accommodating through hole (402), and the elastic clamp (2) is used to clamp the lens mold (1) placed in the central hole (201); The locking cover (3) is arranged on the supporting platform (401), the locking cover (3) comprises an avoidance hole (301), and the elastic clamping claw (2) is partially located in the avoidance hole (301) and abuts against the locking cover (3), and the locking cover (3) is used to squeeze the elastic clamping claw (2) to clamp the lens mold (1).

2. A centering jig according to claim 1, characterized in that: The base (5) is provided with a boss (501), and the boss (501) is located in the accommodating through hole (402) and is used to support the lens mold (1).

3. A centering jig according to claim 1, characterized in that: The locking cover (3) is connected to the core fixing seat (4) via threads, the outer peripheral side of the locking cover (3) is provided with an external thread, and the core fixing seat (4) is located above the support platform (401) and is provided with an internal thread that matches the external thread.

4. A centering jig according to claim 3, characterized in that: A plurality of wrench grooves (302) are provided on the surface of the locking cover (3).

5. A centering jig according to claim 1, characterized in that: An upper inclined surface (202) and a lower inclined surface (203) connected at an angle are provided on the outer peripheral side of the elastic clamping claw (2); a first inclined surface (303) supporting the upper inclined surface (202) is provided on the locking cover (3) at the avoidance hole (301); and a second inclined surface (403) supporting the lower inclined surface (203) is provided on the supporting platform (401).

6. A centering jig according to claim 5, characterized in that: The elastic clamp (2) also includes: A plurality of inner side walls (204), the plurality of inner side walls (204) are spaced apart and surround the central hole (201), and the central hole (201) has a central axis; A plurality of outer side walls (205) are arranged on a side of the inner side wall (204) away from the central axis, the plurality of outer side walls (205) are spaced apart around the central axis, and the outer side walls (205) and the inner side wall (204) are offset from each other in a direction perpendicular to the central axis; A plurality of connecting walls (206), wherein the plurality of connecting walls (206) are spaced apart and distributed around the central axis, and two ends of the connecting walls (206) are respectively connected to the inner wall (204) and the outer wall (205); a plurality of first gaps (207), wherein the first gaps (207) are formed by enclosing two adjacent connecting walls (206) and one outer side wall (205), and the first gaps (207) are open toward the central axis; A plurality of second gaps (208), wherein the second gaps (208) are formed by enclosing two adjacent connecting walls (206) and one inner wall (204), and the second gaps (208) are open away from the central axis.

7. A centering jig according to claim 6, characterized in that: The first gap (207) and the second gap (208) both penetrate the elastic clamping claw (2) in the direction of the central axis.

8. A centering jig according to claim 6, characterized in that: The width of the first gap (207) is 0.1 mm to 0.4 mm.

9. A centering jig according to claim 6, characterized in that: The width of the second gap (208) is 0.05 mm to 0.2 mm.

10. The centering jig according to claim 1, characterized in that: The base (5) is connected to the fixed core seat (4) via bolts.

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