Pin structure for injection molding of glasses legs

Abstract

The utility model discloses a contact pin structure for injection molding of glasses legs, which comprises a contact pin body, one end of the contact pin body is provided with a contact pin snapping part, the other end of the contact pin body is provided with a contact pin fixing part, and the cutting part of the head of the contact pin fixing part is provided with a notch through hole for preventing the head from becoming white. According to the technical scheme, the plastic material enters the notch through hole during injection molding, so that the plastic material and the inner wall surface of the notch through hole are bonded and fixed, after injection molding is completed, redundant positioning parts of the head part of the pin fixing part are cut off from the notch through hole, and at the moment, the plastic material and the inner wall surface of the notch through hole are bonded and fixed, so that the pin fixing part cannot be damaged. Therefore, metal and plastic at the cut-off position of the head of the contact pin fixing part are reliably connected, gaps or warped separation is not easy to generate, the structure is simple, whitening or watermark generation between the metal and the plastic in the use process is avoided, the quality is stable, and the practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of glasses manufacturing, in particular to an inserting pin structure for injection molding glasses legs. Background Art

[0002] Glasses play an increasingly important role in people's lives. In our daily lives, glasses play an increasingly important role for myopic people, and for non-myopic people, glasses are a kind of fashionable decoration. As an important component of glasses, glasses legs directly affect the service life of glasses. There are many kinds of glasses frames on the market, but glasses frames combined with plastic and metal injection molding are deeply loved by consumers. They can make up for the defects of pure plastic materials with poor bending resistance and easy breakage, and can also make up for the poor corrosion resistance and oxidation resistance of metal materials. However, the existing pin structure of the glasses legs still has shortcomings: after the pin fixing part of the existing glasses legs is injection molded, the metal and plastic at the cut-off point of the pin fixing part are easily separated to form a gap. During use, the gap formed by the metal and plastic is prone to whitening and watermarks, resulting in unstable quality and poor practicality. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a pin structure for injection molding eyeglass legs, which has a reasonable structural design, a simple structure, is not prone to whitening or watermarks at the cutoff of the head of the pin fixing part, has stable quality and is good in practicality.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a pin structure for injection molding eyeglass legs, comprising a pin body, one end of the pin body is provided with a pin breaking portion, the other end of the pin body is provided with a pin fixing portion, and the head of the pin fixing portion is provided with a cut-off hole for preventing the head from turning white.

[0005] The utility model is further configured as follows: the cutout through hole is a rectangular through hole, the length of the cutout through hole is 0.8-1.2 mm, and the height is 3.5-4.2 mm.

[0006] The utility model is further configured as follows: the pin fixing portion is integrally provided with a pin positioning portion away from the end of the pin body, and the pin positioning portion is provided with at least one positioning through hole away from the end of the pin fixing portion.

[0007] The utility model is further configured as follows: the length of the pin body is 140-150 mm, the thickness of the pin body is 0.8-1.2 mm, and the height of the pin body is 5-6 mm.

[0008] The utility model is further configured as follows: a hinge welding groove is arranged near the position of the cutout through hole on the pin fixing portion.

[0009] The utility model is further configured as follows: the pin body is provided with an arc-shaped end portion near the pin breaking portion, and the pin body is provided with a positioning groove near the arc-shaped end portion.

[0010] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model has a reasonable structural design, and the pin positioning part and the outer end of the pin breaking part of the pin body are fixed to fix the pin body at both ends, so that the pin body is reliably fixed during the injection molding process and will not shake at will, and the plastic material will enter the incision through hole during injection molding, so that the plastic material is bonded and fixed to the inner wall surface of the incision through hole, and when the injection molding is completed, the head of the pin fixing part cuts off the excess positioning part from the incision through hole. At this time, since the plastic material is bonded and fixed to the inner wall surface of the incision through hole, the metal and plastic at the cut-off part of the head of the pin fixing part are reliably connected, and it is not easy to produce gaps or warp and detach. The structure is simple, and no whitening or watermarks will be produced between the metal and the plastic during use. The quality is stable and the practicality is good.

[0011] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0013] Figure 2 It is a partial structural schematic diagram of an embodiment of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the pin fixing portion after the head portion is cut off according to the embodiment of the utility model;

[0015] Figure 4 This is a schematic diagram of the assembly of the utility model after injection molding and installation on the mirror frame. DETAILED DESCRIPTION

[0016] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] See also Figures 1 to 4The utility model discloses a pin structure for injection molding eyeglass legs, comprising a pin body 1, one end of which is provided with a pin breaking portion 2, and the other end of which is provided with a pin fixing portion 3, wherein a cutout through hole 11 is provided at the cut-off portion of the head of the pin fixing portion 3 for preventing the head from turning white.

[0018] Preferably, the cutout through hole 11 is a rectangular through hole, and the length of the cutout through hole 11 is 0.8-1.2 mm and the height is 3.5-4.2 mm.

[0019] The end of the pin fixing portion 3 facing away from the pin body 1 is integrally provided with a pin positioning portion 4 , and the end of the pin positioning portion 4 facing away from the pin fixing portion is provided with at least one positioning through hole 41 .

[0020] The length of the pin body 1 is 140-150 mm, the thickness of the pin body 1 is 0.8-1.2 mm, and the height of the pin body 1 is 5-6 mm.

[0021] The pin fixing portion 3 is provided with a hinge welding groove 12 near the cutout through hole 11 .

[0022] The pin body 1 is provided with an arc-shaped end portion 13 near the pin breaking portion 2 , and the pin body 1 is provided with a positioning groove 14 near the arc-shaped end portion 13 .

[0023] The pin body 1 described in the present embodiment is made of metal, and a plastic layer is formed on the outer surface of the pin body 1 by injection molding. The plastic layer is locally bonded and fixed to the inner wall surface of the notched through hole 11, so that the metal and plastic at the cut-off point of the head of the pin fixing part 3 are reliably connected and are not prone to gaps or warping and detachment, effectively solving the technical problem of whitening and watermarks in the gap between the metal and plastic at the cut-off point of the head of the pin fixing part during use.

[0024] In actual application, the pin positioning part 4 and the outer end of the pin breaking part 2 of the pin body 1 are fixed to fix the pin body 1 at both ends, so that the pin body 1 is reliably fixed during the injection molding process without any shaking, and the plastic material will enter the cut-out through hole 11 during the injection molding, so that the plastic material is bonded and fixed to the inner wall surface of the cut-out through hole 11. When the injection molding is completed, the head of the pin fixing part cuts off the excess positioning part from the cut-out through hole 11. At this time, since the plastic material is bonded and fixed to the inner wall surface of the cut-out through hole 11, the metal and plastic at the cut-off part of the head of the pin fixing part are reliably connected, and it is not easy to produce gaps or warp and detach. The structural design is reasonable and simple. There will be no whitening or watermarks between the metal and the plastic during use. The quality is stable and the practicability is good.

[0025] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A pin structure for injection molding eyeglass legs, comprising a pin body (1), one end of the pin body (1) being provided with a pin breaking portion (2), and the other end of the pin body (1) being provided with a pin fixing portion (3), characterized in that: A cutout through hole (11) is provided at the cut-off portion of the head of the pin fixing portion (3) for preventing the head from turning white.

2. The pin structure for injection molding eyeglass legs according to claim 1, characterized in that: The cutout through hole (11) is a rectangular through hole, and the length of the cutout through hole (11) is 0.8-1.2 mm, and the height is 3.5-4.2 mm.

3. The pin structure for injection molding eyeglass legs according to claim 2, characterized in that: The end of the plug pin fixing portion (3) facing away from the plug pin body (1) is integrally provided with a plug pin positioning portion (4), and the end of the plug pin positioning portion (4) facing away from the plug pin fixing portion is provided with at least one positioning through hole (41).

4. The pin structure for injection molding eyeglass legs according to claim 3, characterized in that: The length of the plug pin body (1) is 140-150 mm, the thickness of the plug pin body (1) is 0.8-1.2 mm, and the height of the plug pin body (1) is 5-6 mm.

5. The pin structure for injection molding of eyeglass legs according to claim 4, characterized in that: The pin fixing portion (3) is provided with a hinge welding groove (12) near the cutout through hole (11).

6. A pin structure for injection molding eyeglass legs according to claim 1 or 5, characterized in that: The pin body (1) is provided with an arc-shaped end portion (13) near the pin breaking portion (2), and the pin body (1) is provided with a positioning groove (14) near the arc-shaped end portion (13).

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