Multi-fuse wire threading clamp for surface-mounted fuse

Abstract

The utility model discloses a multi-fuse wire threading clamp for a surface-mounted fuse, and belongs to the technical field of electronic components. Comprising an upper die, a lower die and an end face limiting plate. The upper die comprises an upper die body, an upper die fuse groove, a glue filling hole, an observation hole and an upper die screw hole. A plurality of rows of upper die fuse grooves are distributed in parallel; the glue filling hole is positioned right above the product forming cavity of the upper film, and the observation hole is positioned right above the overflow cavity of the lower film; the lower die comprises a lower die body, a lower die fuse groove, a cavity partition plate, a neutral wire penetrating plate and a lower die screw hole. The lower die fuse wire grooves are arranged in a plurality of rows and correspond to the upper die fuse wire grooves, each row of lower die fuse wire grooves is provided with a plurality of cavity partition plates and neutral wire penetrating plates, the adjacent cavity partition plates and the upper die fuse wire grooves jointly form a product forming cavity, each cavity partition plate and each neutral wire penetrating plate are provided with a plurality of wire penetrating holes, and the end face limiting plates are located at the two ends of the die. The problems that an existing product is low in rated voltage, and arcing, cracking, continuous arcing and the like are prone to occurring in the fusing process are solved. The fuse with the linear fuse structure is widely applied to the fuse technology with the linear fuse structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic components, and further relates to the technical field of fuses, and specifically relates to a multi-fuse threading fixture for a surface-mounted fuse. Background Art

[0002] Fuses play the role of overcurrent protection and short circuit protection in circuits, and the main protective role is the fuse element. According to the formation process of the fuse element, common surface mount fuses are divided into filament structure fuses and film fuses. The fuse element of the filament surface mount fuse is a sheet or wire fuse of metal or alloy, and the fuse element of the film surface mount fuse is mainly a conductive metal film formed by processes such as screen printing or sputtering.

[0003] For filamentary surface mount fuses, the existing fuse body structure is composed of a single-piece sheet fuse, a stack of multiple sheet fuses, or a single fuse. In the above three fuse structures, during the fuse blowing process, the electric arc generated during the blowing is concentrated on a single fuse, resulting in high arc energy, which is prone to failure phenomena such as fuse arcing, shell rupture, and continuous arcing. Therefore, the currently common filamentary surface mount fuses have a rated voltage of no more than 500VDC, which can no longer meet the current social development needs. For example, the rated voltage required by automobiles, ships, etc. has reached 800VDC, 1000VDC, etc.

[0004] In view of this, the present utility model is proposed. Summary of the invention

[0005] The technical problem to be solved by the utility model is to solve the problem that the existing filament fuse can only be manufactured with a single fuse structure due to the limitation of the manufacturing fixture, resulting in difficulty in increasing the rated voltage and prone to failure phenomena such as fuse arcing, shell rupture, continuous arcing, etc. when fusing.

[0006] The inventive concept of the utility model is: in order to realize the production of a multi-fuse structure fuse, a multi-fuse threading fixture of the utility model is specially designed to insert multiple fuses into the fuse ceramic tube to realize the research and development and production of a multi-fuse structure fuse. The threading fixture enables the fuse structure in a small surface mount fuse to realize multiple fuses (multi-wire structure), which can greatly improve the rated voltage and breaking capacity of the fuse.

[0007] To this end, the utility model provides a surface mount fuse multi-fuse threading fixture, such as Figures 1-4 As shown, it comprises: an upper die 1, a lower die 2 and an end face limiting plate 3.

[0008] The upper die 1 includes an upper die body 101, an upper die fuse groove 102, a glue injection hole 103, an observation hole 104, and an upper die screw hole 105. The upper die fuse groove 102 is located on the bottom surface of the upper die (product forming surface), penetrates the bottom surface of the upper die, and is distributed in multiple parallel columns (at least 2 columns). The glue injection hole 103 is located directly above the product forming cavity of the upper film and penetrates the upper die for injecting glue. The observation hole 104 is located directly above the overflow cavity of the lower film for observing the filling condition of the cavity with glue. The upper die screw hole 105 penetrates the upper die. The upper die 1 is provided with a guiding hole that cooperates with the guiding column of the lower die 2 for precise positioning of the upper and lower dies.

[0009] The lower die 2 includes a lower die body 201, a lower die fuse groove 202, a cavity partition plate 203, a blank wire threading plate 204, and a lower die screw hole 205. The lower die fuse groove 202 is located on the top surface of the lower die (product forming surface), penetrates the bottom surface of the lower die, and is distributed in multiple parallel columns (at least 2 columns). Each column of the lower die fuse groove 202 is provided with multiple (at least 2) cavity partition plates 203 and blank wire threading plates 204. The product forming cavity is jointly formed between adjacent cavity partition plates 203 and the upper die fuse groove 102. Each cavity partition plate 203 is provided with multiple wire threading holes (at least 2). The overflow cavity of the lower film is opened at both radial ends of each cavity partition plate 203, and the overflow cavity of the lower film communicates with the product forming cavity. The lower die 2 is provided with a guiding column for precise positioning of the upper and lower dies.

[0010] The components on the die surfaces (product forming surfaces) of the upper die 1 and the lower die 2 correspond to and match each other.

[0011] The end face limiting plate 3 includes a limiting plate body 301, a limiting plate fuse fixing part 302, and a limiting plate fuse fixing hole 303. The limiting plate fuse fixing part 302 and the limiting plate fuse fixing hole 303 are used to fix the fuse ends at both ends of the die.

[0012] The technical effects of the present utility model are as follows:

[0013] 1. It can manufacture filament fuses with a multi-fuse structure.

[0014] 2. It helps to design products with a multi-fuse structure, can significantly reduce the difficulty of arc suppression, and achieve the purpose of increasing the rated voltage of the fuse. It avoids problems such as easy occurrence of fuse arcing, shell rupture, and continuous arcing during fuse melting.

[0015] 3. The linear fuses inside the fuse are designed into a multi-fuse structure. During the fuse melting process, the generated arc energy will be evenly distributed on multiple fuses. The arc energy generated by each fuse is much lower than the arc energy generated by a single fuse in a single-fuse structure. This arc energy is absorbed and quenched by the arc suppression material filled around the fuses.

[0016] 4. Realizing the industrial production of multi-wire structure fuses plays a positive role in promoting the development of industry process technology.

[0017] It can be widely applied to the technology of linear fuse structure fuses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the upper die structure.

[0019] Figure 2 It is a schematic diagram of the lower die structure.

[0020] Figure 3 It is a schematic diagram of the end face limiting plate structure.

[0021] Figure 4 It is a schematic diagram of the assembly structure.

[0022] In the figure: 1 is the upper die, 101 is the upper die body, 102 is the upper die fuse groove, 103 is the glue filling hole, 104 is the observation hole, 105 is the upper die screw hole, 2 is the lower die, 201 is the lower die body, 202 is the lower die fuse groove, 203 is the cavity partition disc, 204 is the empty space wire threading disc, 205 is the lower die screw hole, 3 is the end face limiting plate, 301 is the limiting plate body, 302 is the limiting plate fuse fixing part, 303 is the limiting plate fuse fixing hole. DETAILED DESCRIPTION OF THE INVENTION

[0023] As Figure 1 shown, the specific implementation manner of the surface mount fuse multi-fuse wire threading fixture is as follows:

[0024] The upper die fuse grooves 102 and the lower die fuse grooves 202 are each 10 rows.

[0025] The cavities of the upper die fuse grooves 102 and the lower die fuse grooves 202 are symmetrically arranged up and down.

[0026] In the lower die fuse groove 202, 2 consecutive empty space wire threading discs 204 are arranged between every 4 consecutive cavity partition discs 203.

[0027] The wire threading holes of the cavity partition discs 203 and the empty space wire threading discs 204 are 3.

[0028] The glue filling hole 103 is a tapered hole.

[0029] The observation hole 104 is an elliptical hole.

[0030] The guiding columns of the lower die 2 are 4 and are symmetrically distributed on both sides of the die.

[0031] The installation and use process is as follows:

[0032] ① Place the lower die on the operation platform;

[0033] ② Install the end face baffle on the lower die with tweezers;

[0034] ③ Cut a fuse of appropriate length according to the length of the lower die mold. Pass the fuse through the end face baffle and fix both ends of the fuse;

[0035] ④ Cover the upper die;

[0036] ⑤ Pour the filling material into the glue filling hole and observe through the observation hole until the filling material emerges from the wire passing hole, then stop pouring the filling material;

[0037] ⑥ After the filling material is cured, cut the fuse through the observation hole, remove the upper die from the lower die, and take out the semi-finished product composed of the fuse and the arc suppressing material for subsequent assembly and welding use.

[0038] Finally, it should be noted that the above embodiments are only examples clearly described. The present invention includes but is not limited to the above embodiments, and it is not necessary and impossible to enumerate all implementation manners here. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. Any implementation manner that meets the requirements of the present invention belongs to the protection scope of the present invention.

Claims

1. A multi-fuse threading fixture for surface-mount fuses, characterized in that: include: An upper die (1), a lower die (2) and an end surface limiting plate (3); The upper mold (1) comprises an upper mold body (101), an upper mold fuse slot (102), a glue injection hole (103), an observation hole (104), and an upper mold screw hole (105); the upper mold fuse slot (102) is located on the upper mold product molding surface and penetrates the upper mold product molding surface, and is arranged in at least 2 rows and parallel to each other; the glue injection hole (103) is located directly above the upper film product molding cavity and penetrates the upper mold; the observation hole (104) is located directly above the lower film overflow cavity; the upper mold screw hole (105) penetrates the upper mold; the upper mold (1) is provided with a guide hole, which cooperates with the guide column of the lower mold (2); The lower mold (2) comprises a lower mold body (201), a lower mold fuse slot (202), a cavity baffle plate (203), an idle threading plate (204), and a lower mold screw hole (205); the lower mold fuse slot (202) is located on the lower mold product molding surface, passes through the lower mold product molding surface, and is arranged in at least two rows in parallel. Each row of lower mold fuse slots (202) is provided with at least two cavity baffle plates (203) and idle threading plates (204). Adjacent cavity baffle plates (203) together with the upper mold fuse slot (102) form a product molding cavity. Each cavity baffle plate (203) is provided with at least two threading holes. Each cavity baffle plate (203) is provided with a lower film overflow cavity at both radial ends, and the lower film overflow cavity is connected to the product molding cavity. The lower mold (2) is provided with a guide column; The upper mold (1) and the lower mold (2) have a one-to-one matching function for each component of the mold product molding surface; The end surface limiting plate (3) comprises a limiting plate body (301), a limiting plate fuse fixing portion (302), and a limiting plate fuse fixing hole (303).

2. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: The upper mold fuse slots (102) and the lower mold fuse slots (202) are respectively provided with 10 rows.

3. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: The cavities of the upper mold fuse slot (102) and the lower mold fuse slot (202) are symmetrical in the upper and lower directions.

4. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: In the lower mold fuse slot (202), two continuous idle wire threading disks (204) are arranged between every four continuous cavity barrier disks (203).

5. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: The cavity barrier disk (203) and the idle wire-threading disk (204) have three wire-threading holes.

6. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: The glue injection hole (103) is a tapered hole.

7. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: The observation hole (104) is an elliptical hole.

8. A multi-fuse threading fixture for a surface-mount fuse as claimed in claim 1, characterized in that: The lower mold (2) has four guide columns which are symmetrically distributed on both sides of the mold.

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