Lead frame fixing device for chip production

Abstract

The utility model relates to the field of work fixtures, and discloses a lead frame fixing device for chip production, the bottom end of a fixing shell is provided with a base, the upper part of the fixing shell is recessed downwards to form a fixing cavity, the front side and the rear side of the interior of the fixing cavity are respectively provided with a fixing plate in a sliding manner, and the two fixing plates move synchronously; the left side and the right side of the middle position in the fixing cavity are each provided with a positioning roller in a sliding mode, the two positioning rollers move synchronously, the distance between the two symmetrical fixing plates and the distance between the two positioning rollers can be adjusted at will according to needs, and the lead frame fixing device is suitable for fixing lead frames of various different widths. The two fixing plates are arranged on the front side and the rear side of the interior of the fixing cavity, the two positioning rollers are arranged on the left side and the right side of the fixing cavity, the two fixing plates move synchronously, the two positioning rollers also move synchronously, and the positioning rollers and the lead frame are in line-surface contact, so that the lead frame can be located in the middle of the positioning rollers.

Description

Technical Field

[0001] The utility model relates to the field of tooling fixtures, in particular to a lead frame fixing device used for chip production. Background Art

[0002] When processing the chip lead frame, a specific fixture is required to ensure that the chip lead frame is stable and the processing accuracy is guaranteed during processing. A chip lead frame processing fixture is disclosed in the Chinese utility model patent with announcement number CN214560180U, including a bottom plate and surrounding side plates. The bottom plate and the surrounding side plates enclose a chamber for placing the chip lead frame. The chip lead frames of different widths are positioned by inserts, and the chip lead frames of different lengths are adjusted by the cooperation of slots and inserts. It can meet the needs of multi-size chip lead frame processing, save costs, and improve processing efficiency. In the above structure, when positioning the lead frame, the insert needs to be positioned with the slot, and the insert needs to be replaced and used in combination. Since the spacing of the slot and the size of the insert are also fixed, it can only position and fix lead frames of a variety of specific sizes, and cannot be applied to lead frames of a variety of different sizes. For this reason, we designed a lead frame fixing device for chip production. Utility Model Content

[0003] In order to solve the technical problem that lead frames of various sizes cannot be applied, the utility model provides a lead frame fixing device for chip production.

[0004] The utility model is implemented by the following technical scheme: a lead frame fixing device for chip production, comprising a fixing shell, a base is installed at the bottom end of the fixing shell, the upper part of the fixing shell is recessed downward to form a fixing cavity, a fixing plate is slidably arranged on the front and rear sides of the fixing cavity, and the two fixing plates move synchronously, and a positioning roller is slidably arranged on the left and right sides of the middle position of the fixing cavity, and the two positioning rollers move synchronously.

[0005] As a further improvement of the above scheme, a plurality of symmetrically arranged transverse sliding holes are provided on the front and rear sides of the bottom end of the fixed cavity, and three equally spaced transverse axis plates are provided on the front and rear sides of the bottom end of the fixed shell. A transverse screw is rotatably installed between the transverse axis plates in the middle of the left and right sides. A movable screw seat is formed in the middle of the bottom end of the fixed plate, which is threadedly connected to the transverse screw seat, and a knob is provided at the front end of the transverse screw rod. By turning the knob, the transverse screw rod can be rotated, and the two fixed plates can be moved inward or outward synchronously, so that the lead frame can be fixed between the two fixed plates, and they can be moved to any position, so that lead frames of various lengths can be fixed.

[0006] As a further improvement of the above scheme, a guide rod is fixed between the corresponding transverse axis plates on the left and right sides of the transverse screw rod, and guide slide plates are symmetrically arranged on the left and right sides below the fixed plate. The guide slide plates are slidably sleeved on the guide rods, which can guide the fixed plate and make its movement more stable.

[0007] As a further improvement of the above scheme, symmetrically arranged longitudinal sliding holes are opened on the left and right sides of the bottom end of the fixed cavity, and longitudinal axis plates are arranged on the left and right sides below the fixed shell, a longitudinal screw rod is rotatably installed between the two longitudinal axis plates, a knob 2 is arranged on the right side of the longitudinal screw rod, and two movable screw seats are symmetrically arranged on the left and right sides of the longitudinal screw rod, a mounting shaft is rotatably installed above the movable screw seat 2, the positioning roller is installed on the mounting shaft, and the lower surface of the positioning roller is not in direct contact with the bottom end of the fixed cavity, rotating knob 2 can rotate the longitudinal screw rod, and then the two positioning rollers can move inward or outward synchronously, so that the left and right sides of the lead frame can be positioned so that it is in the middle position, and it is suitable for lead frames of various widths.

[0008] As a further improvement of the above scheme, the longitudinal screw rod and the transverse screw rod are both composed of two screw rods welded together, and the spiral directions of the threads on the two screw rods are opposite. The longitudinal screw rod is above the transverse screw rod. When the longitudinal screw rod or the transverse screw rod is rotated, the two movable screw seats 1 on the transverse screw rod or the two movable screw seats 2 on the longitudinal screw rod can move inward or outward at the same time, thereby fixing the lead frame and ensuring that the lead frame is always in the middle of the fixed cavity, which is convenient for subsequent processing and positioning.

[0009] As a further improvement of the above scheme, a groove is provided on the upper surface of the base, and the four surfaces of the base, front, back, left and right, are respectively provided with notch one and notch two corresponding to the transverse axis plate and the longitudinal axis plate, so as to facilitate the installation of the fixed shell above the base and hide the transverse screw rod and the longitudinal screw rod therein.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The utility model has two symmetrical fixing plates that slide forward and backward inside the fixing cavity, and two positioning rollers that slide left and right are set in the middle position inside the fixing cavity. The spacing between them can be adjusted arbitrarily according to needs, and is suitable for fixing lead frames of various widths and sizes;

[0012] 2. By setting two fixing plates on the front and back sides of the fixing cavity and two positioning rollers on the left and right sides thereof, the two fixing plates move synchronously, the two positioning rollers also move synchronously, and the positioning rollers and the lead frame adopt a line-surface contact method, which can make the lead frame in the middle between them, facilitating subsequent processing and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a lead frame fixing device for chip production provided by the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0015] Figure 3 for Figure 1 Schematic diagram of the bottom of the fixed shell;

[0016] Figure 4 for Figure 1 Schematic diagram of the structure of the middle base.

[0017] Description of main symbols:

[0018] 1. Fixed shell; 11. Fixed cavity; 12. Horizontal sliding hole; 13. Longitudinal sliding hole; 14. Horizontal axis plate; 15. Longitudinal axis plate; 2. Base; 21. Notch 1; 22. Notch 2; 3. Fixed plate; 31. Moving screw seat 1; 32. Guide slide plate; 4. Positioning roller; 41. Moving screw seat 2; 5. Horizontal screw rod; 6. Guide rod; 7. Longitudinal screw rod. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0020] Example:

[0021] Please combine Figure 1-Figure 4 A lead frame fixing device for chip production in this embodiment includes a fixing shell 1, a base 2 is installed at the bottom end of the fixing shell 1, a fixing cavity 11 is formed by a downward depression on the top of the fixing shell 1, a fixing plate 3 is slidably arranged on the front and rear sides of the fixing cavity 11, and the two fixing plates 3 move synchronously, and a positioning roller 32 is slidably arranged on the left and right sides of the middle position of the fixing cavity 11, and the two positioning rollers 32 move synchronously.

[0022] A plurality of symmetrically arranged transverse sliding holes 12 are provided on the front and rear sides of the bottom end of the fixed cavity 11, and three equally spaced transverse axis plates 14 are provided on the front and rear sides of the bottom end of the fixed shell 1, and a transverse screw rod 5 is rotatably installed between the middle transverse axis plates 14 on the left and right sides, and a movable screw seat 31 is formed at the middle of the bottom end of the fixed plate 3, which is threadedly connected to the transverse screw rod 5, and a knob 1 is provided at the front end of the transverse screw rod 5, and the transverse screw rod 5 can be rotated by rotating the knob 1, so that the two fixed plates 3 can be moved inward or outward synchronously, so that the lead frame can be fixed between the two fixed plates 3, and they can be moved to any position, so that lead frames of various lengths can be fixed.

[0023] A guide rod 6 is fixed between the corresponding transverse shaft plates 14 on the left and right sides of the transverse screw rod 5, and guide slide plates 32 are symmetrically arranged on the left and right sides below the fixed plate 3. The guide slide plates 32 are slidably sleeved on the guide rod 6, which can guide the fixed plate 3 and make its movement more stable.

[0024] Symmetrically arranged longitudinal sliding holes 13 are provided on the left and right sides of the bottom end of the fixed cavity 11, and longitudinal axis plates 15 are provided on the left and right sides below the fixed shell 1, a longitudinal screw rod 7 is rotatably installed between the left and right longitudinal axis plates 15, a knob 2 is provided on the right side of the longitudinal screw rod 7, and a movable screw seat 2 41 is symmetrically arranged on the left and right sides of the longitudinal screw rod 7, and a mounting shaft is rotatably installed above the movable screw seat 2 41, a positioning roller 32 is installed on the mounting shaft, and the lower surface of the positioning roller 32 is not in direct contact with the bottom end of the fixed cavity 11, rotating the knob 2 can rotate the longitudinal screw rod 7, and then the two positioning rollers 32 can move inward or outward synchronously, so that the left and right sides of the lead frame can be positioned so that it is in the middle position, and it is suitable for lead frames of various different widths.

[0025] The longitudinal screw rod 7 and the transverse screw rod 5 are both composed of two screw rods welded together, and the spiral directions of the threads on the two screw rods are opposite. The longitudinal screw rod 7 is above the transverse screw rod 5. When the longitudinal screw rod 7 or the transverse screw rod 5 is rotated, the two movable screw seats 1 31 on the transverse screw rod 5 or the two movable screw seats 2 41 on the longitudinal screw rod 7 can move inward or outward at the same time, thereby fixing the lead frame and ensuring that the lead frame is always in the middle of the fixed cavity 11, which is convenient for subsequent processing and positioning.

[0026] A groove is provided on the upper surface of the base 2, and a notch 21 and a notch 22 corresponding to the transverse axis plate 14 and the longitudinal axis plate 15 are respectively provided on the front, back, left and right surfaces of the base 2, so as to facilitate the installation of the fixed shell 1 above the base 2 and hide the transverse screw rod 5 and the longitudinal screw rod 7 therein.

[0027] The implementation principle of a lead frame fixing device for chip production in the embodiment of the present application is as follows: in actual use, the lead frame is placed at the bottom end of the fixed cavity 11, and it is between the two positioning rollers 32 and the two fixed plates 3. At this time, the knob 2 is first turned clockwise, so that the longitudinal screw rod 7 can be rotated clockwise, and the two movable screw seats 2 41 will move inward synchronously, so that the positioning roller 32 contacts the left and right surfaces of the lead frame, and then the knob 1 is turned clockwise. At this time, the two fixed plates 3 will move inward synchronously. If the front and rear sides of the lead frame are not spaced apart from the front and rear inner walls of the fixed cavity 11, the fixed plate 3 on the side with a closer distance will contact the lead frame first, and because the lead frame and the positioning roller 32 are in line and surface contact, the resistance between the two is extremely small. At this time, the fixed plate 3 can push the lead frame to move and make its front and rear sides contact the two fixed plates 3 respectively. At this time, the fixation of the lead frame can be completed. When releasing the fixation, it is only necessary to rotate the knobs 1 and 2 in the opposite directions.

[0028] Two symmetrical fixing plates 3 are arranged to slide forward and backward inside the fixing cavity 11, and two positioning rollers 32 are arranged to slide left and right in the middle position inside the fixing cavity 11. The spacing between them can be adjusted arbitrarily as needed, which is suitable for fixing lead frames of various widths and sizes.

[0029] By arranging two fixing plates 3 on the front and rear sides of the fixing cavity 11 and two positioning rollers 32 on the left and right sides thereof, the two fixing plates 3 move synchronously, the two positioning rollers 32 also move synchronously, and the positioning rollers 32 and the lead frame adopt a line-surface contact method, which can make the lead frame be located in the middle between them, which is convenient for subsequent processing and positioning.

[0030] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A lead frame fixing device for chip production, comprising a fixing shell (1), characterized in that: A base (2) is installed at the bottom end of the fixed shell (1); a fixed cavity (11) is formed by a downward depression on the top of the fixed shell (1); a fixed plate (3) is slidably arranged on the front and rear sides of the fixed cavity (11), and the two fixed plates (3) move synchronously; a positioning roller (4) is slidably arranged on the left and right sides of the middle position of the fixed cavity (11), and the two positioning rollers (4) move synchronously.

2. A lead frame fixing device for chip production as claimed in claim 1, characterized in that: A plurality of symmetrically arranged transverse sliding holes (12) are provided on both the front and rear sides of the bottom end of the fixed cavity (11); three equally spaced transverse shaft plates (14) are provided on both the front and rear sides of the bottom end of the fixed shell (1); and a transverse screw rod (5) is rotatably installed between the transverse shaft plates (14) in the middle of the left and right sides; A movable screw seat (31) is formed in a downwardly protruding middle portion of the bottom end of the fixing plate (3). The movable screw seat (31) is threadedly connected to the transverse screw rod (5), and a knob (1) is provided at the front end of the transverse screw rod (5).

3. A lead frame fixing device for chip production as claimed in claim 2, characterized in that: A guide rod (6) is fixed between the left and right sides of the transverse screw rod (5) corresponding to the transverse shaft plates (14), and guide slide plates (32) are symmetrically arranged on the left and right sides below the fixed plate (3), and the guide slide plates (32) are slidably sleeved on the guide rod (6).

4. A lead frame fixing device for chip production as claimed in claim 3, characterized in that: The bottom end of the fixed cavity (11) is provided with symmetrically arranged longitudinal sliding holes (13) on the left and right sides, and the bottom of the fixed shell is provided with longitudinal shaft plates (15) on the left and right sides, a longitudinal screw rod (7) is rotatably installed between the two longitudinal shaft plates (15), a knob 2 is provided on the right side of the longitudinal screw rod (7), and a movable screw seat 2 (41) is symmetrically arranged on the left and right sides of the longitudinal screw rod (7), and a mounting shaft is rotatably installed above the movable screw seat 2 (41), the positioning roller (4) is installed on the mounting shaft, and the lower surface of the positioning roller (4) does not directly contact the bottom end of the fixed cavity (11).

5. A lead frame fixing device for chip production as claimed in claim 4, characterized in that: The longitudinal screw rod (7) and the transverse screw rod (5) are both formed by welding two screw rods, and the screw threads on the two screw rods have opposite directions. The longitudinal screw rod (7) is located above the transverse screw rod (5).

6. A lead frame fixing device for chip production as claimed in claim 4, characterized in that: The upper surface of the base (2) is provided with a groove, and the four surfaces of the base (2) are provided with a first notch (21) and a second notch (22) corresponding to the transverse axis plate (14) and the longitudinal axis plate (15) respectively.

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