CN213078980U

CN213078980U - Needle tube clamp for gluing lead frame

Info

Publication number: CN213078980U
Application number: CN202021494246.6U
Authority: CN
Inventors: 曾尚文; 陈久元; 杨利明; 李洪贞
Original assignee: Sichuan Jinghui Semiconductor Co ltd
Current assignee: Sichuan Jinghui Semiconductor Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-04-30
Anticipated expiration: 2030-07-27

Abstract

The application provides a needle tubing anchor clamps for lead frame rubber coating, include: a clamping block and a ball. The glue spreading machine comprises a clamping block, a ball and a plurality of needle tubes, wherein the clamping block is provided with a pair of clamping blocks, a plurality of hemispherical holes are processed on the opposite surfaces of the clamping block, the hemispherical holes on the two sides of the clamping block are constructed into a spherical cavity (the spherical cavity penetrates through the upper surface and the lower surface of the clamping block, and a compression screw penetrates through the clamping block corresponding to all the spherical cavities), the ball is movably arranged in the spherical cavity and used for penetrating the needle tubes, so that a plurality of needle tubes can be clamped simultaneously, the glue spreading work of a whole row of pins can be completed at one time, and the glue spreading efficiency is effectively.

Description

Needle tube clamp for gluing lead frame

Technical Field

The utility model belongs to semiconductor lead frame production field especially relates to a be used for rubber coated needle tubing anchor clamps of lead frame.

Background

The structure of the semiconductor lead frame is shown in fig. 6, when the semiconductor lead frame is used for product production, pins are required to be coated with glue and then chips are required to be mounted, and the pins on the lead frame are arranged densely, so that the arrangement of needle tubes and glue containers above the needle tubes is convenient, and the glue coating work of the lead frame with different pin intervals is adapted. Most of the existing glue coating devices adopt a single needle tube for coating glue; or the glue is coated at intervals by using needles with the number which is multiple times less than that of the pins, for example, the glue is coated on odd rows first, and then even rows are coated. However, the two methods need to be completed for multiple times when a whole row of pins are coated, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

For solving prior art not enough, the utility model provides a be used for rubber coated needle tubing anchor clamps of lead frame can many needle tubes of centre gripping simultaneously, can once only accomplish the rubber coating work of an permutation pin, effectual improvement rubber coated production efficiency.

In order to realize the purpose of the utility model, the following scheme is proposed:

a needle tube clamp for lead frame glue spreading, comprising: a clamping block and a ball.

The clamping blocks are provided with a pair of clamping blocks, a plurality of hemispherical holes are processed on the opposite surfaces of the clamping blocks, the hemispherical holes on the two sides of the clamping blocks after the clamping blocks are attached form spherical cavities (the spherical cavities penetrate through the upper surface and the lower surface of the clamping blocks, and compression screws penetrate through the clamping blocks corresponding to all the spherical cavities;

the ball is movably arranged in the ball-shaped cavity and used for being penetrated with a needle tube.

Furthermore, the ball processing has the counter bore, be equipped with the rubber bush in the counter bore, the needle tubing passes the rubber bush, the hole diameter of rubber bush is less than the external diameter of needle tubing.

Furthermore, a bottom hole is coaxially processed at the bottom of the counter bore, and the inner diameter of the bottom hole is larger than the diameter of the inner hole of the rubber bushing.

Furthermore, a pair of the clamping blocks are provided with compression screws.

Further, the pair of clamping blocks are connected by a locking screw.

Furthermore, threaded holes are machined in the two ends of the clamping block.

Furthermore, the outer surface of the ball is roughened, so that the surface roughness is increased.

Furthermore, the upper end face and the lower end face of the round ball along the axis direction of the needle tube are both processed into plane structures.

The beneficial effects of the utility model reside in that:

1. the ball can move in the spherical cavity, and the position of the needle tube outlet can be changed by adjusting the position of the ball in the spherical cavity so as to adapt to the gluing work of lead frames with different pin pitches;

2. a plurality of needle tubes can be clamped simultaneously, the gluing work of an entire row of pins can be finished at one time, and the production efficiency is effectively improved;

3. utilize the elasticity of rubber, fix the needle tubing through rubber bush, simple structure need not increase extra fixed establishment, is convenient for adjust the extension length of needle tubing moreover.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

FIG. 1 shows a construction diagram of the present application;

FIG. 2 shows an exploded view of the present application;

FIG. 3 shows the configuration of the ball and its connection to the rubber bushing;

FIG. 4 illustrates a use state of the present application;

FIG. 5 illustrates another use state of the present application;

fig. 6 shows a block diagram of a segment of a lead frame.

The labels in the figure are: 1-needle tube, 10-clamping block, 101-threaded hole, 11-hemispherical hole, 12-spherical cavity, 13-compression screw, 14-locking screw, 20-sphere, 21-counter bore, 22-rubber bushing and 23-bottom hole.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are some embodiments of the present invention, not all embodiments.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the product of the present invention is usually placed when in use, and this is only for the convenience of description of the present invention and simplification of the description. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

As shown in fig. 1 to 5, a needle jig for lead frame glue application includes: a clamping block 10 and a spherical ball 20.

Specifically, the clamping blocks 10 are provided in a pair, and the clamping blocks 10 are made of strip materials with rectangular sections and can be made of stainless steel materials. The clamping blocks 10 are connected by locking screws 14, wherein one clamping block 10 is provided with a through hole. The other clamping block 10 is provided with a threaded hole, and a locking screw 14 passes through the through hole to be connected with the threaded hole so as to connect the two clamping blocks 10.

The opposite surfaces of the clamping blocks 10 are provided with a plurality of hemispherical holes 11, the hemispherical holes 11 on two sides of the jointed clamping blocks 10 form a spherical cavity 12, because the diameter of the hemispherical hole 11 is larger than the height of the clamping block 10, and the radius of the hemispherical hole 11 is smaller than the thickness of the clamping block 10, when the clamping block 10 is provided with the hemispherical hole 11, a semicircular groove is formed on the upper and lower surfaces, and two semicircular grooves form a round hole after the two clamping blocks 10 are folded, so the spherical cavity 12 formed by the hemispherical holes 11 on two sides has a structure penetrating through the upper and lower surfaces of the clamping block 10.

The clamping block 10 is provided with a pressing screw 13 corresponding to all the spherical cavities 12 in a penetrating way, and the front end of the pressing screw 13 is positioned in the spherical cavity 12.

More specifically, to facilitate connection of the jig to other devices, threaded holes 101 are formed at both ends of the clamping block 10.

Specifically, the round ball 20 is movably arranged in the spherical cavity 12, the round ball 20 is used for penetrating the needle tube 1, the position of the needle tube 1 is adjusted by rotating the round ball 20, and the round ball 20 is pressed and fixed by the compression screw 13 after the position of the needle tube 1 is adjusted to be qualified.

More specifically, the ball 20 is processed with a counter bore 21, a rubber bushing 22 is arranged in the counter bore 21, the needle tube 1 penetrates through an inner hole of the rubber bushing 22, the inner hole diameter of the rubber bushing 22 is smaller than the outer diameter of the needle tube 1, the rubber bushing 22 compresses the needle tube 1 tightly by using the elasticity of rubber, the needle tube 1 is convenient to move, meanwhile, the position of the needle tube 1 can be guaranteed to be unchanged, and the structure is simple and effective.

Preferably, in order to stabilize the position of the spherical ball 20 in the spherical cavity 12, the pair of clamping blocks 10 are provided with the compression screws 13, and each spherical cavity 12 compresses the spherical ball 20 through two compression screws 13.

Preferably, the rubber bush 22 is tightly pressed and installed in the counter bore 22 in an interference manner, and the rubber material is aged due to long-term use, so that the elasticity is reduced, the clamping of the needle tube 1 is not facilitated, in order to take out the rubber bush 22, a bottom hole 23 is coaxially processed at the bottom of the counter bore 21, the inner diameter of the bottom hole 23 is larger than the diameter of an inner hole of the rubber bush 22, and the rubber bush 22 can be ejected out from one end of the bottom hole 23.

Preferably, the outer surface of the round ball 20 is roughened, so that the surface roughness is increased, the round ball 20 is less likely to move under the condition of being pressed by the compression screw 13, and the position of the needle tube 1 is ensured to be unchanged.

Preferably, in order to avoid the sharp end of the round ball 20 caused by the processing of the counterbore 22 and the bottom hole 23, the upper end surface and the lower end surface of the round ball 20 along the axial direction of the needle tube 1 are both processed into a plane structure, so as to avoid being scratched by the sharp end during operation.

The specific implementation process comprises the following steps: fig. 4 and 5 show two usage status diagrams of the needle tube clamp, the needle tube clamp of the present application can be used for pins with different intervals or when the container connected above the needle tube 1 is large and cannot be arranged in parallel, as shown in fig. 5, the position of the needle can be adjusted by changing the inclination angle of the needle tube 1, in order to make the needle in the same plane, the needle tube 1 needs to be moved and adjusted in the rubber bushing 22, the inclination angle of the needle tube 1 is realized by adjusting the position of the round ball 20, and when the position of the needle tube 1 is adjusted, the round ball is pressed by the compression screw 13.

The foregoing is only a preferred embodiment of the invention and is not intended to be the only or limiting embodiment of the invention. It should be understood by those skilled in the art that various changes and equivalent substitutions made herein may be made without departing from the scope of the invention as defined by the appended claims.

Claims

1. A needle tubing anchor clamps for lead frame rubber coating, its characterized in that includes:

the clamping device comprises a pair of clamping blocks (10), wherein a plurality of hemispherical holes (11) are formed in opposite surfaces of the clamping blocks (10), the hemispherical holes (11) on two sides of the clamping blocks (10) are jointed to form a spherical cavity (12), the spherical cavity (12) penetrates through the upper surface and the lower surface of the clamping blocks (10), and compression screws (13) penetrate through the clamping blocks (10) corresponding to all the spherical cavities (12);

the round ball (20), the round ball (20) is movably arranged in the spherical cavity (12), and the round ball (20) is used for being penetrated with the needle tube (1).

2. The needle tube clamp for lead frame gluing according to claim 1, wherein the round ball (20) is processed with a counter bore (21), a rubber bushing (22) is arranged in the counter bore (21), the needle tube (1) passes through an inner bore of the rubber bushing (22), and the inner bore diameter of the rubber bushing (22) is smaller than the outer diameter of the needle tube (1).

3. The needle tube clamp for lead frame gluing according to claim 2, characterized in that a bottom hole (23) is coaxially machined at the bottom of the counter bore (21), and the inner diameter of the bottom hole (23) is larger than the diameter of the inner hole of the rubber bushing (22).

4. Needle clamp for lead frame gluing according to claim 1, characterized in that a pair of said clamping blocks (10) are each provided with a compression screw (13).

5. The needle clamp for leadframe gluing according to claim 1, characterized in that the pair of clamping blocks (10) are connected with locking screws (14).

6. The needle tube clamp for gluing lead frames according to claim 1, characterized in that both ends of the clamping block (10) are provided with threaded holes (101).

7. The needle tube clamp for leadframe glue spreading according to claim 1, wherein the outer surface of the ball (20) is roughened to increase surface roughness.

8. The needle tube clamp for lead frame gluing according to claim 1, characterized in that the upper and lower end surfaces of the round ball (20) along the axial direction of the needle tube (1) are processed into a plane structure.