CN114639997A

CN114639997A - Flat wire for increasing connecting force and production method

Info

Publication number: CN114639997A
Application number: CN202210285247.7A
Authority: CN
Inventors: 屠厚春; 唐恒
Original assignee: Jingshi Electronics Technology Co ltd Suzhou
Current assignee: Jingshi Electronics Technology Co ltd Suzhou
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-06-17

Abstract

The invention relates to the technical field of cables, in particular to a flat wire for increasing connecting force, which comprises insulating layers on two sides and a conductor layer in the middle, wherein the conductor layer consists of a plurality of parallel flat conductors, gaps are formed between every two adjacent flat conductors, the insulating layers are combined into a whole at the gaps to form a separating body, the separating body is divided to form branches and a main body, side lug structures are formed on the separating body on the branches, and zero gaps are formed between the side lug structures and the main body; the side lug structure with 0 clearance tolerance is formed on the branch, so that the retention force during plugging is enhanced to the maximum extent.

Description

Flat wire for increasing connecting force and production method

Technical Field

The invention relates to the technical field of cables, in particular to a flat wire for increasing connecting force and a production method of the flat wire.

Background

The flexible flat cable has a flat structure, is small in size, meets the requirement of equipment miniaturization, can be plugged by a connector, is simple, convenient and quick to connect, saves labor and time, and is widely applied to the fields of personal electronic equipment, printers, household appliances and electric vehicles.

The flat cable is provided with a plurality of flat conductors, different conductors can form branches to be used for different purposes, the branch conductors are connected with the connector in a plugging mode in general, in order to keep firm connection, an additional connection reinforcing structure is required to be arranged, even welding is required to be adopted to realize connection with the connector, and the production process is increased.

Disclosure of Invention

Accordingly, the present invention is directed to overcome the disadvantages of the prior art and to provide a flat wire with increased connection force, in which a side lug structure with 0-tolerance is formed on the branch to maximize the retention force during plugging.

The invention relates to a flat wire for increasing connection force, which comprises insulating layers on two sides and a conductor layer in the middle, wherein the conductor layer consists of a plurality of parallel flat conductors, gaps are arranged between every two adjacent flat conductors, the insulating layers are combined at the gaps to form a separating body integrally, the separating body is divided to form branches and a main body, side lug structures are formed on the separating body on the branches, and zero gaps are formed between the side lug structures and the main body.

Further, the side ear structure has at least one notch.

Further, the lateral ear structures are distributed at any position of the branches along the length direction.

Furthermore, the branch is provided with at least two flat conductors, and a connection reinforcing hole is arranged between every two adjacent flat conductors.

Further, at least a portion of the flat conductors at the position of the side lug structures are exposed.

According to the production method of the flat wire for increasing the connecting force, the side lug structure is manufactured by adopting a punching method and comprises the steps of die cutting and blanking.

Furthermore, the die cutting step takes a straight line parallel to the separating body as a die cutting line, the main body and the branch are firstly divided into strips, and then the notch is punched on the edge of the separating body of the branch part.

Further, the die cutting step is to cut the sheet by using a folding line having a bending shape as a die cutting line, the bending shape is in accordance with the shape of the notch, the division body having the shape of the notch remains on the main body part after the die cutting, and then the division body is cut off from the division body of the main body part by blanking.

Furthermore, the punching is carried out by adopting a combined die which comprises an upper material supporting plate and a lower material supporting plate which are opposite up and down, and a movable knife punch, wherein the lower material supporting plate is provided with a lower cutting part protruding out of the surface, the side edge of the lower cutting part forms a lower cutting part, the upper material supporting plate forms an upper cutting part recessed in the surface, and the vertical wall of the side edge of the upper cutting part forms an upper cutting part;

the movable knife punch is movably matched with the upper support plate, the lower end of the movable knife punch is provided with a punching part, the edge of the punching part is divided into a first punching blade on the inner side and a second punching blade on the outer side, the first punching blade is in a shape consistent with the edge of the notch, the second punching blade is attached to the upper blade part, the upper support plate and the lower support plate are provided with punching holes for the movable knife punch to longitudinally move, and the lower blade part is provided with a folded part in a shape consistent with the edge of the notch.

Furthermore, a punching piece is arranged in the movable knife punch; the die-cut portion further includes a cutting edge.

The invention has the beneficial effects that: the invention discloses a flat wire for increasing connection force, which is used for electrical or communication connection different from a main body by forming branches, wherein a separation body is arranged between the branches and the main body, a side lug structure is formed on the separation body to plug a connector, and a zero gap is formed between the side lug structure and the main body, so that the limit design of the side lug structure in the width direction is realized, and the retention force during plugging is increased to the maximum extent.

Drawings

The invention is further described below with reference to the following figures and examples:

FIG. 1 is a schematic view and a partially enlarged view of the flat wire of the present invention;

FIG. 2 is a schematic view and a partially enlarged view of a composite mold used in the present invention;

FIG. 3 is a front view of the split mold;

FIG. 4 is a bottom view and a partial enlarged view of the retainer plate of the combined mold;

FIG. 5 is a schematic view of the combination of the moving punch of the combination die;

FIG. 6 is a bottom view of the moving blade punch;

fig. 7 shows die cutting lines for two die cutting modes.

Description of reference numerals: the flat conductor 101, the separating body 102, the branch 103, the main body 104, the side lug structure 105, the notch 106, the connection reinforcing hole 107, the upper retainer plate 210, the upper cutting part 211, the upper blade part 212, the lower retainer plate 220, the lower cutting part 221, the lower blade part 222, the folded part 223, the moving knife punch 230, the punching part 231, the first punching blade 232, the second punching blade 233, the punching part 234 and the cutting blade 235.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the flat wire with increased connection force in the present embodiment is obtained by blanking and die cutting through a combined die, the flat wire used for production has a plurality of parallel flat conductors 101, by using the method, a side lug structure 105 can be formed on one or a plurality of parallel flat conductors 101, and when the flat conductors 101 are plugged into a connector, the side lug structure 105 can effectively increase the retention force with the connector.

Specifically, the flat wire substrate is produced according to the prior art, a conductor layer is formed by hot-pressing and gluing a layer of conductor layer between two layers of insulating sheets, the conductor layer is a plurality of parallel flat conductors 101, a certain gap is formed between every two adjacent flat conductors 101, the insulating sheets on the two sides are directly combined into a whole at the gap, and a part of each flat conductor 101 is exposed through windowing.

Taking the above-mentioned flat wire base material as a raw material, the side lug structure 105 is formed by punching, in this embodiment, a 7PIN flat wire (i.e. having 7 flat conductors) is taken as an example, two parallel flat conductors 101 are independent, a separate connection end is formed at the middle position, the side lug structure 105 is formed at the connection end, a separate connector can be connected, hereinafter, a cable including two independent flat conductors 101 is referred to as a branch 103, a cable including the other flat conductors 101 is referred to as a main body 104, and an insulating material at the gap between the branch 103 and the main body 104 and outside the outermost flat conductor is referred to as a separation body 102, which is convenient for the following description.

One specific process of the punching includes die cutting and blanking, wherein the die cutting is performed first, the branch 103 and the main body 104 are divided, specifically, a line (such as a linear die cutting line in fig. 7) parallel to the flat conductor 101, such as a bisector or a trisection line of the division body 102, is used as a dividing line, the flat wire base material is preliminarily divided into strips, then the branch 103 and the division body 102 on the side of the branch 103 are fixed, the division body is punched under the fixed condition, the punching position avoids the conductor, only the division body 102 is punched to form triangular or trapezoidal notches 106, the number of the notches 106 is at least one, the number of the notches 106 is three in this embodiment, the three notches 106 are spaced at a certain distance, and the rest of the division body 102 forms the side lug structure 105. And the side ear structure 105 achieves zero clearance with the body 104, achieving a limit design in width dimension with 0 to 0 tolerance, which is beneficial to increase retention with the connector.

The specific forming process of the notch 106 can also be realized during the die cutting, in which a die cutter having the shape of the notch 106 is used to perform the slitting by using a folding line having the shape of the notch 106 as a die cutting line (e.g., a bending die cutting line in fig. 7), the division body 102 having the shape of the notch 106 remains on the main body 104, and then the division body 102 is cut from the main body 104 by punching.

Another embodiment of punching is to punch first and then die cut, i.e., a generally triangular or trapezoidal shaped pass is first formed on the separator 102 by punching, and then die cut along the outside edges of the pass, again resulting in a side ear structure 105 with a tolerance of 0-0.

The various punching processes can be completed by using a combined die with the following structure:

as shown in fig. 2 to 5, the combined mold includes an upper retainer plate 210 and a lower retainer plate 220 which are opposite to each other, and further includes a moving punch 230, a material passage is formed between the upper retainer plate 210 and the lower retainer plate 220 so that the flat wire substrate can be inserted, the lower retainer plate 220 has a lower cutting portion 221 protruding from the surface, a lower cutting portion 222 is formed at a side of the lower cutting portion 221, the upper retainer plate 210 forms an upper cutting portion 211 recessed from the surface, similarly, a vertical wall of the upper cutting portion 211 forms an upper cutting portion 212, and the upper cutting portion 211 and the lower cutting portion 221 are engaged with each other, and when the mold is closed, the parting cutting is completed by using the height misalignment of the upper cutting portion 212 and the lower cutting portion 222.

As shown in fig. 5, the upper cutting portion 211 and the lower cutting portion 221 are fixedly disposed on the upper retainer plate 210 and the lower retainer plate 220 in the form of inserts.

The movable knife punch 230 is movably fitted on the upper retainer plate 210 or the lower retainer plate 220, and in this embodiment, the movable knife punch 230 is assembled at the upper retainer plate 210, the lower end of the movable knife punch 230 is provided with a punching portion 231, the edge of the punching portion 231 is divided into a first punching edge 232 at the inner side and a second punching edge 233 at the outer side, as shown in fig. 6, the first punching edge 232 has a shape consistent with the edge of the notch 106 to be formed, and the second punching edge 233 is attached to the upper edge portion 212 and is positioned on the same straight line. The upper retainer plate 210 and the lower retainer plate 220 are provided with punching holes for the moving knife punch 230 to move longitudinally, and particularly, the existence of the punching holes of the lower retainer plate 220 enables the lower edge part 222 to form a folded part 223 with the same shape as the edge of the notch 106, and the rest part still keeps the linear shape extension with the same shape as the upper edge part 212.

The specific operation of the above-mentioned mold will be explained as follows:

the punching portion 231 at the bottom of the moving punch 230 is first flush with the bottom of the upper retainer plate 210, and the upper edge portion 212 and the first punching edge 232 of the punching portion 231 together form a zigzag cutting edge having the shape of the notch 106 on the bottom surface of the upper retainer plate 210.

When the upper and lower dies are closed, the first punching blade 232 of the movable punch 230 and the bent portion 223 of the lower blade portion 222 together perform die cutting on the division body 102 at the connection end position, the notch 106 is formed at the branch 103, the straight portions of the upper blade portion 212 and the lower blade portion 222 perform die cutting at the other positions, division is completed, the division body 102 formed by the notch 106 remains on the division body 102 at the side of the main body 104, and punching is completed by the second punching blade 233 of the movable punch 230 through the lower punching of the movable punch 230 under the condition that the dies are kept closed.

As shown in fig. 5, the movable blade punch 230 is a split structure and is composed of a plurality of single punching blades, each single punching blade completes punching at different positions of the notch 106, and each single punching blade adopts a structure with a large top and a small bottom to enhance the toughness.

For example, while holding the upper retainer plate 210 and the lower retainer plate 220 to clamp and fix the flat wire substrate, the moving punch 230 punches to form a hole pattern on the partition body 102, and then closes the die to divide the wire into strips, and the second punching edge 233 of the moving punch 230 is attached to the upper edge 212 and is positioned on the same straight line as the lower edge, so that the side lug structure 105 with a tolerance of 0-0 can be obtained.

In the present embodiment, the branch 103 has two flat conductors 101, and as a further improvement, a connection enhancing hole 107 may be formed in a portion between the two flat conductors 101, and when the connector is inserted, the connection may be enhanced by a structure such as a pin, and the connection enhancing hole 107 may also be formed by blanking, and a corresponding punching piece 234 may be provided in the movable punch 230.

The above-described stamping process may occur at any location along the length of the flat wire, and the side ear structure 105 in this embodiment may be formed at any location along the branch 103.

On the other hand, in punching, the branch 103 may be cut by the movable blade punch 230 to form an end portion separate from the main body, and the cutting edge 235 may be provided in the punching portion 231 of the movable blade punch 230.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an increase flat wire of joint force, includes the insulating layer of both sides and middle conductor layer, the conductor layer comprises a plurality of flat conductors that parallel, its characterized in that: the flat conductors are arranged in the main body, the insulating layers are combined into a whole to form a separating body at the gap, the separating body is divided to form a branch and the main body, a side lug structure is formed on the separating body on the branch, a zero gap is formed between the side lug structure and the main body, and the side lug structure is provided with at least one notch.

2. The flat wire for increasing a connecting force according to claim 1, wherein: the lateral ear structures are distributed at any position of the branches along the length direction.

3. The flat wire for increasing a connecting force according to claim 1, wherein: the branch is provided with at least two flat conductors, and a connection reinforcing hole is arranged between every two adjacent flat conductors.

4. The flat wire for increasing a connecting force according to claim 1, wherein: at least a portion of the flat conductors at the position of the side lug structures are exposed.

5. A production method of a flat wire for increasing connection force is characterized by comprising the following steps: the flat wire for manufacturing the side ear structure of any one of claims 1-4, wherein the side ear structure is manufactured by a punching method, and the punching method comprises the steps of die cutting and blanking.

6. The method for producing a flat wire with an increased connection force according to claim 5, wherein: in the die cutting step, a straight line parallel to the separating bodies is used as a die cutting line, the main body and the branches are firstly separated into strips, and then the notches are punched on the edges of the separating bodies of the branches.

7. The method for producing a flat wire with an increased connection force according to claim 5, wherein: the die cutting step is to cut by taking a folding line with a bending shape as a die cutting line, the bending shape is consistent with the shape of the notch, the separating body with the shape of the notch is remained on the main body part after die cutting, and then the separating body is cut off from the separating body of the main body part by blanking.

8. The method for producing a flat wire with an increased joining force according to any one of claims 5 to 7, wherein: the punching is carried out by adopting a combined die which comprises an upper material supporting plate and a lower material supporting plate which are opposite up and down, and a movable knife punch, wherein the lower material supporting plate is provided with a lower cutting part protruding out of the surface, the side edge of the lower cutting part forms a lower cutting part, the upper material supporting plate forms an upper cutting part recessed in the surface, and the vertical wall of the side edge of the upper cutting part forms an upper cutting part;

9. The method for producing a flat wire with an increased connection force according to any one of claims 8, wherein: the movable knife punch is internally provided with a punching piece; the die-cut portion further includes a cutting edge.