A plastic housing and a connection terminal for installing a connection terminal

Abstract

The present invention provides a plastic housing for a terminal, which is used to install and connect the terminal. The plastic housing includes a main body; the main body is configured as an integrally formed single member; the main body includes a top surface and a bottom surface which are oppositely arranged, and the bottom surface is recessed towards the top surface to form an internal space for accommodating a conductive terminal. The internal space is provided with a connecting portion for cooperating with a clamping portion of the conductive terminal; the front end surface of the main body is provided with a wire insertion hole for inserting a wire into the conductive terminal, and the wire insertion hole is communicated with the internal space; wherein, limited by the maximum width of the wire insertion hole, a cutting is made from the top surface downwardly extending through the bottom surface to form a first cutting surface with the front end surface of the main body at the upper and lower positions of the wire insertion hole respectively and a second cutting surface with the bottom of the main body. The projections of the first cutting surface and the second cutting surface in the first direction do not overlap, making other aspects and advantages of the present invention extremely obvious. The present application further provides a connecting terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical connectors, and more particularly, to a plastic housing for mounting connection terminals and connection terminals. Background Art

[0002] An electrical connector is a component used to connect two ends of power lines or data lines, etc. for power or electronic data transmission. From large aircraft and ships to small computers and mobile phones, connectors are used, and almost all electronic products use connectors.

[0003] As electronic products become more and more complex, the requirements for stable electrical connection performance are correspondingly improved. Among them, as a very important and widely used electrical connection product, a connector is used to achieve electrical connection and conduction after an external plug-in (such as a wire, etc.) is inserted, and to disconnect the electrical connection after the external plug-in is detached. Therefore, the electrical contact quality of the electrical connection is particularly important, and the main factor affecting the contact quality of the electrical connector is the configuration method between the terminal and the plastic housing. During the process of the conductive terminal achieving electrical connection with the external plug-in, the external plug-in is inserted into the interior of the housing and makes electrical contact with the conductive terminal. Particularly importantly, there are various plastic housing structures of wiring terminals in the prior art. However, for the plastic housing structures of existing terminals, they generally have defects such as unreasonable design, inconvenient batch manufacturing, and imperfect structure, resulting in cumbersome production manufacturing and low production efficiency. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a plastic housing for mounting connection terminals, and another object is to provide a connection terminal to solve the above problems.

[0005] The present invention adopts the following solutions:

[0006] The present application provides a plastic housing for mounting connection terminals, including a main body; the main body is configured as an integrally formed single member; the main body includes a top surface and a bottom surface arranged opposite to each other, the bottom surface is recessed towards the top surface direction to form an internal space for accommodating conductive terminals, and the internal space is provided with a connection portion for cooperating with a clamping portion of the conductive terminals; a wire insertion hole for inserting a wire into the conductive terminals is provided on the front end surface of the main body, and the wire insertion hole is communicated with the internal space; wherein, limited by the maximum width of the wire insertion hole, a first cutting surface is formed on the front end surface of the main body at the upper and lower positions of the wire insertion hole by cutting and extending downward from the top surface through the bottom surface, and a second cutting surface is formed with the bottom of the main body, and the projections of the first cutting surface and the second cutting surface in the first direction do not overlap.

[0007] As a further improvement, the top surface of the main body extends cut-away towards the bottom, and is in communication with the internal space to form the connecting portion.

[0008] As a further improvement, the wire insertion hole extends backward and penetrates the rear end face of the main body so that the inserted wire can penetrate the main body.

[0009] As a further improvement, the top surface and the bottom surface are enclosed by the side surfaces to form a hollow shell shape; wherein, the wire insertion hole is provided in the side surface, and an exposure opening is correspondingly provided at the side surface opposite to the wire insertion hole. The exposure opening is configured to be recessed along the outer peripheral edge of a part of the top surface and hollow out a part of the side surface thereat. Both the wire insertion hole and the exposure opening are in communication with the internal space.

[0010] As a further improvement, a guiding area is formed on the front end face of the main body with the wire insertion hole as the center, and the guiding area guides the wire to be inserted into the wire insertion hole.

[0011] The present application further provides a connection terminal, including the above-mentioned plastic housing for installing the connection terminal and the conductive terminal disposed in the main body; wherein, the conductive terminal is a contact frame, and the contact frame is provided with a clamping joint for inserting a wire and a clamping portion that can be engaged with the connecting portion of the plastic housing; wherein, the clamping joint is constituted by a pair of elastic members, and the free ends of the two elastic members are configured to be inwardly bent structures and are symmetrically disposed in the contact frame, so as to elastically cooperate to elastically clamp the wire after the wire enters the wire passing channel along the wire insertion hole provided in the main body.

[0012] As a further improvement, the contact frame is integrally formed by a metal part, and includes a supporting bottom and mounting side parts; the supporting bottom is configured as a strip-shaped plate and is located below the wire passing channel, and the length direction thereof is consistent with the trend of the wire passing channel; the mounting side parts are vertically disposed on both sides of the supporting bottom to form two wing structures, and the contact frame is clamped and assembled in the main body through the two wing structures.

[0013] As a further improvement, the elastic member is configured as a leaf spring, and the leaf spring extends and is disposed on the mounting side part and points in the opposite direction to the insertion of the wire; the end of the elastic member far from the free end is integrally formed on one side of the mounting side part, and forms a free end with elastic force lying horizontally on the supporting bottom through at least one inward bending.

[0014] As a further improvement, the clamping gear of the contact frame is: the width value between the two mounting side parts is 1.4 mm - 2.4 mm, and the length value of the inward bending is 0.5 mm - 1.1 mm.

[0015] As a further improvement, the internal space of the main body includes a first installation cavity and a second installation cavity. The first installation cavity and the second installation cavity form a stepped bottom surface, and the clamping portion of the conductive terminal is located in the second installation cavity to bear part or all of the force when the wire is inserted into the conductive terminal.

[0016] Other features of the present invention will become apparent from the following description of exemplary embodiments (with reference to the accompanying drawings). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention from a first perspective;

[0019] Figure 2 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention from a second perspective;

[0020] Figure 3 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention from a third perspective;

[0021] Figure 4 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention from a fourth perspective;

[0022] Figure 5 is Figure 3 a sectional view taken along line A-A in

[0023] Figure 6 is Figure 3 a sectional view taken along line B-B in

[0024] Figure 7 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention from another perspective;

[0025] Figure 8 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention from other perspectives;

[0026] Figure 9 is a schematic structural view of the plastic housing for installing connection terminals according to an embodiment of the present invention;

[0027] Figure 10It is a schematic structural diagram of a connection terminal according to an embodiment of the present invention. Among them, the following figure is an exploded schematic diagram of the above figure;

[0028] Figure 11 It is a schematic structural diagram of the contact frame of the new connection terminal according to an embodiment of the present invention;

[0029] Figure 12 is Figure 11 A schematic structural diagram from another perspective;

[0030] Figure 13 is Figure 11 A schematic structural diagram from other perspectives;

[0031] Figure 14 It is a sectional view of the connection terminal according to an embodiment of the present invention;

[0032] Figure 15 It is another sectional view of the connection terminal according to an embodiment of the present invention;

[0033] Figure 16 It is a schematic structural diagram of the contact frame of the connection terminal according to an embodiment of the present invention from other perspectives;

[0034] Figure 17 is Figure 16 A schematic structural diagram from another perspective;

[0035] Figure 18 It is a schematic structural diagram of the connection terminal according to an embodiment of the present invention from another perspective;

[0036] Figure 19 is Figure 18 The sectional view at C-C in it. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] Embodiment

[0039] In combination with Figures 1 to 6, this embodiment provides a plastic housing for installing connection terminals, including a main body 1, and the main body 1 is configured as an integrally formed single component. Among them, the main body 1 includes a top surface 11 and a bottom surface 12 arranged opposite to each other, and the bottom surface 12 is recessed towards the top surface 11 to form an internal space for accommodating conductive terminals. The internal space is provided with a connecting portion for cooperating with the clamping portion of the conductive terminal. The front end surface of the main body 1 is provided with a wire insertion hole 14 for inserting a wire into the conductive terminal, and the wire insertion hole 14 is communicated with the internal space. Among them, limited by the maximum width of the wire insertion hole 14, a first cutting surface 1A is formed on the front end surface of the main body 1 and a second cutting surface 1B is formed on the bottom of the main body by cutting and extending downward from the top surface 11 through the bottom surface, and the projections of the first cutting surface 1A and the second cutting surface 1B in the first direction do not overlap.

[0040] In this embodiment, the main body 1 is an integrally formed single component, which is conducive to manufacturing and production. Among them, the main body 1 encloses a housing with an internal space through the top surface 11, the bottom surface 12 and the side surface 13, and the bottom surface is recessed downward to form at least part of the internal space, so that the main body 1 is constructed as a hollow-bottomed shell shape, which can effectively save materials, reduce production costs, and is also conducive to daily maintenance and the heat dissipation effect inside during electrical connection, with strong practicability.

[0041] In addition, part of the bottom surface 12 sinks and depresses to coincide with the inner wall of the top surface 11, and the outer wall of the bottom surface 12 is formed at the bottom of each side surface. When looking down at the main body 1 in the first direction, the projection of the first cutting surface 1A formed on the front end surface of the main body 1 (on one side surface 13) and the second cutting surface 1B formed on the bottom surface 12 of the main body 1 do not overlap. On the one hand, it ensures the wall thickness and its connection strength, is not easy to break and damage, and is more reliable. On the other hand, the construction method of the top surface 11 and the bottom surface 12 is conducive to the quick demolding of the plastic housing up and down in the vertical direction during molding, and can well avoid the undercut structure, so as to cancel the use of redundant sliders in the injection mold, making the manufacturing of the plastic housing simple and efficient. It has the advantages of novel structural design, convenient production and manufacturing, etc., avoiding the limitations of the manufacturing and use of plastic shells, and making other aspects and advantages of the present invention extremely obvious.

[0042] Particularly important is that the top surface 11 and the bottom surface 12 do not overlap at least on the front end surface side, and there is a spacing margin between them, so that when automatically clamping and transporting the main body, the alignment detection module equipped in the clamping mechanism (not shown in the figure) located on the front end surface side can directly penetrate into and out of the main body in the first direction, so as to achieve convenient alignment and detection operations, which is extremely suitable for the automated production line.

[0043] Among them, it should be noted that the first direction is the vertical direction passing through the top surface 11 and the bottom surface 12, and is perpendicular to the wire insertion direction. Additionally, the wire insertion hole 14 is a regular or irregular hole-shaped structure, and its maximum width is the maximum width dimension along the transverse direction.

[0044] Please refer to Figure 8 and Figure 9 , in one embodiment, the top surface 11 of the main body extends by cutting towards the bottom surface 12, and is connected to the internal space and forms a connecting portion. Among them, a through hole 16 is provided on the top surface 11, and the through hole 16 only penetrates the top surface 11 and can be recessed in the inner wall of the main body 1 to form a connecting portion with a engaging surface. Specifically, the main body 1 further includes a partition wall 17 that separates the internal space. The partition wall 17 is horizontally disposed in the main body 1 along the wire insertion direction and divides the internal space into multiple sub-spaces for assembling conductive terminals, and each sub-space has a wire passing channel. This ensures that each sub-space can be individually inserted with a wire to expand the utilization of the internal space.

[0045] It should be noted that the through hole 16 in the sub-space is partially recessed in the inner wall of the partition wall 17 and the side surface 13 opposite to the partition wall 17, ensuring that at least each sub-space has a connecting portion capable of engaging the conductive terminal, so that the conductive terminal can be assembled and fixed in the main body 1.

[0046] In one embodiment, the wire insertion hole 14 extends backward and penetrates the rear end surface of the main body 1 so that the inserted wire can penetrate the main body 1. Among them, the top surface 11 and the bottom surface 12 are enclosed by the side surface 13 to form a hollow shell shape. The wire insertion hole 14 penetrates the side surface 13, and an exposure opening 15 is correspondingly provided at the side surface 13 opposite to the wire insertion hole 14. The exposure opening 15 is configured to be recessed along the outer peripheral edge of a part of the top surface 11 and hollow out a part of the side surface 13 there. The wire insertion hole 14 and the exposure opening 15 are both connected to the internal space. After the wire enters the internal space horizontally along the wire insertion hole 14, the wire terminal can clamp the wire and allow the wire to continue to pass through the main body 1 until at least a part of the end of the wire passes through the exposure opening 15, so that the user can directly observe the wire exposed outside the exposure opening 15.

[0047] Thus, by forming a wire insertion hole 14 and an exposed opening 15 opposite to the wire insertion hole 14 on the side surface 13 of the main body 1 respectively, and the wire passing channel is located between the wire insertion hole 14 and the exposed opening 15, after the wire enters the main body 1 along the wire insertion hole 14, it can be clamped in the conductive terminal and continue to pass through the main body 1 until the end of the wire passes through the exposed opening 15 to be exposed outside the main body 1, so that the user can directly know that the wire penetrates the entire main body 1, realizing a fully plugged electrical connection method, which greatly facilitates the user's wiring use and obtaining and judging the plugging situation of the wire. In addition, the through-type plugging can design the specifications of the terminal to be narrower and more compact, so as to save costs and meet the miniaturization design.

[0048] In one embodiment, specifically, the wire insertion hole 14 is connected to the wire passing channel, and a guiding area 131 is formed by recessing the front end along the insertion direction of the side surface 13 where the wire insertion hole 14 is located. Among them, the front end surface of the main body forms a guiding area 131 centered on the wire insertion hole. The guiding area 131 can guide the wire to be inserted into the wire insertion hole 14. The guiding area 131 is recessed vertically from top to bottom and can communicate with the internal space of the side surface where it is located through the wire insertion hole 14. Thus, on the one hand, the guiding area 131 recessed outside the side surface 13 is used to provide shielding and protection for the wire after insertion to avoid being affected by the external environment. On the other hand, the guiding area 131 is recessed vertically and can communicate with the bottom surface 12 downward, avoiding an undercut structure on the molding die, which further facilitates the vertical demolding of the main body 1.

[0049] Among them, particularly, the side surfaces 13 not provided with the wire insertion hole 14 and the exposed opening 15 are located on both sides of the main body 1, and the side surfaces 13 at this place are both constructed as parallel surfaces with equal wall thickness to meet the production and manufacturing requirements.

[0050] Among them, additionally, in one embodiment, the side surfaces are connected and formed at the outer peripheral edges of the top surface 11 and the bottom surface 12, so that the side surfaces 13 of the main body 1 are smoothly butted with the top surface 11 and the bottom surface 12. Among them, the outer peripheral edge of the top surface 11 does not coincide with the inner peripheral edge of the lower bottom surface 12 formed at the bottom of the side surface 13 in the vertical direction (the first direction). Thus, such an avoidance setting method of the top surface 11 and the bottom surface 12 can provide more convenient conditions for the demolding of the main body 1 during injection molding, facilitate the demolding operation in the up and down directions respectively, reduce unnecessary side sliders, realize demolding at one time, and ensure the reasonable design of the wall thickness of each side surface 13, making it more firm and reliable.

[0051] It should be noted that the outer peripheral edges of the top surface 11 and the bottom surface 12, as well as the inner peripheral edges of the top surface 11 and the bottom surface 12, are respectively connected by the side surface 13. The inner peripheral edge of the bottom surface 12 is arranged at a vertical interval from the outer peripheral edge of the top surface 11, further ensuring that the bottom surface 12 and the top surface 11 never overlap, creating convenient conditions for the first demolding after injection molding.

[0052] Please refer to Figure 7 、 Figure 8 and Figure 9 , in an embodiment, the side surface 13 on the side facing the wire insertion direction is configured as an arc surface. The wall thickness of this side surface 13 is generally in a wedge shape that is narrower at the top and wider at the bottom. Part of the bottom surface extends downward to this side surface 13, and part of the side surface 13 can be hollowed out to form a wire insertion hole 14 that penetrates through the main body 1. Among them, differentiating the side surface 13 on the insertion direction side from other side surfaces is conducive to users identifying the required insertion end and has an anti-misinsertion function. Its thin wall is set to be wider at the lower part, increasing the stability and strength of the main body 1.

[0053] Combined with Figures 10 to 19 , this embodiment further provides a connection terminal, which includes the above-mentioned plastic housing for installing the connection terminal and the conductive terminal configured in the main body 1. Among them, the conductive terminal is a contact frame 2. The contact frame 2 has a clamping joint 21 for inserting a wire and a clamping portion that can be engaged with the connecting portion of the plastic housing. And the clamping joint 21 is composed of a pair of elastic members 211. The free ends of the two elastic members 211 are configured into an inwardly bent structure and are symmetrically arranged in the contact frame 2. The elastic cooperation between the inwardly bent structures enables the wire to be elastically clamped after entering the wire passing channel along the wire insertion hole 14 opened in the main body 1.

[0054] In this embodiment, the wire is clamped and fixed by the clamping joint 21 of the contact frame 2. Among them, the clamping joint 21 is composed of a pair of elastic members 211. The free ends of the elastic members 211 are configured into an inwardly bent structure, and the two inwardly bent structures symmetrically arranged on the contact frame 2 form an insertion space that is generally in an outward V shape. There is a spacing between the two ends of the free ends that allows the wire to be inserted and removed, which is conducive to the external wire to enter along the wire insertion hole 14 and then through the insertion space for guiding, so as to be inserted and pass through the spacing between the two ends and then be clamped in the inwardly bent structure of the elastic member 211, making the wire elastically and tightly fitted on the contact frame 2. The two inwardly bent structures continuously provide an approximately centering elastic clamping force to the wire, and the wire is stably and centrally arranged in the clamping joint 21 along the clamping direction to achieve the stable clamping of the wire.

[0055] Please refer to Figure 11 、 Figure 12 and Figure 13In one embodiment, the contact frame 2 is integrally formed of metal parts, and includes a supporting bottom 22 and a mounting side 23. The supporting bottom 22 is constructed in a strip-shaped plate shape and is located below the wire-passing channel, and its length direction is consistent with the direction of the wire-passing channel. The mounting side 23 is vertically arranged on both sides of the supporting bottom 22 to form a two-side wing structure, and the contact frame 2 is snap-fitted and assembled in the main body 1 through the two-side wing structure. Among them, the contact frame 2 integrally formed of metal parts, its mounting side 23 is roughly vertically arranged on both sides of the supporting bottom 22, thereby forming a side wing structure, and then snap-fitted and assembled in the main body 1 through the side wing structure, so that the contact frame 2 is tightly fitted in the main body 1, and is convenient for disassembly and maintenance.

[0056] In one embodiment, specifically, the elastic member 211 is constructed as a leaf spring. The leaf spring is extended and arranged on the mounting side portion 23 and points to the opposite direction of the wire insertion. The end of the elastic member 211 away from the free end is provided on one side of the mounting side portion 23 in an integrally formed manner, and is bent inward at least once to form a free end with elastic force horizontally placed on the supporting bottom 22. Therefore, under the elastic limit of the free ends on both sides, the externally inserted wire can be clamped and placed between the two mounting side portions 23 in a centered manner, ensuring that the wire is clamped firmly under the bidirectional elastic force resistance to achieve electrical connection.

[0057] Among them, it should be mentioned that there is always a gap between the leaf spring and the support bottom. The free swinging of the elastic member 211 on the contact frame 2 is further promoted to provide efficient elastic clamping or reverse pull-out of the wire. In this embodiment, for the unclamping of the wire, an operating mechanism (not shown) for controlling the swinging of the elastic member 211 can be provided, and the wire that needs to be pulled out of the main body 1 in the reverse direction can be unclamped to achieve the pull-out of the wire. Alternatively, the back side of the inner bending structure is constructed as a stop space, and the stop space and the wire insertion space located on the front side of the inner bending structure are opposite to each other in the wire passing channel. The stop space is elastically engaged with the wire placed on the clamping connector 21 in a point contact manner, so that the wire can be separated from the clamping connector 21 by the user directly pulling out the wire in the reverse direction.

[0058] In one embodiment, the body of the supporting bottom 22 is lifted upward so that the two ends are constructed as welding foot structures 24, and the middle part is constructed to protrude upward as a whole and connect with the welding foot structure 24 in a circular arc transition. Among them, the installation side 23 and the clamping joint 21 are both located in the middle. Thereby, the functional components used for clamping and assembly are supported in the main body 1 by elastic force, which is conducive to the clamping of the wire and the stable configuration of the contact frame 2. In addition, the welding foot structure 24 can be installed in place with the main body 1 in a nested and snap-fitting manner, and cooperate with the side wing structure to fix the entire contact frame 2 in the main body 1.

[0059] In the above embodiment, the contact frame 2 is configured as one of the clamping positions. Specifically, the width a between the two mounting side portions 23 is 1.4 mm to 2.4 mm, and the length b of the inner bend is 0.5 mm to 1.1 mm. Figure 4 In the embodiment, the mounting side portion 23 is formed on both sides of the length direction of the supporting bottom 22, so that the width value of the mounting side portion 23 is roughly equal to the width dimension of the supporting bottom 22. Moreover, when the width value a=1.9mm, the allowable width tolerance range is selected as ±0.5mm, and when the length value b=0.8mm, the allowable length tolerance range is selected as ±0.3mm, ensuring that the specifications of the contact frame 2 are better under this parameter, and the corresponding clamping gear is more efficient and significant, which is conducive to clamping the wire in a small size and narrow environment, and greatly ensures the stability and effectiveness of the clamping process. In particular, the length dimension of the inner bending structure is at least half of the length dimension of the elastic member 211.

[0060] It should be noted that the opening value of the wire insertion space in the initial state is 30°-60°. The wire enters the wire passage and is clamped in the contact frame 2 so that the wire insertion space is switched from the initial state to the working state, and the corresponding trigger elastic member 211 is activated to open the two inner bending structures in the direction away from each other. Among them, since the inner bending structure has an elastic restoring force, it can clamp the wire inserted therebetween with elastic force. In other embodiments, the switching between the initial state and the working state can also be achieved by the above-mentioned operating mechanism without too many restrictions.

[0061] In order to demonstrate the effectiveness of various embodiments of the present invention, when the wire is not inserted, the spacing value can be any value between 0 and 0.6 mm and any value in between. Specifically, the floating value range of the spacing between the two ends of the elastic member 211 at the free end is 0.1mm-0.3mm, and the fluctuation range of the opening value is between 5°-24°, thereby allowing the spacing to vary between 0 and 0.9mm after the wire is inserted, so as to adaptively clamp the wire or extract the wire with elastic force. In addition, the opening value of the wire insertion space formed by the two inner bending structures can regularly shrink its opening value as the spacing value changes after the wire is inserted, so that the spacing value and the opening value are inversely proportional.

[0062] Among them, further, the floating value of the spacing and the fluctuation value of the opening value satisfy the following condition: K = 10 * n * L. Wherein, L is the numerical value of the floating value, K is the numerical value of the fluctuation value, and n is a constant and satisfies: 5 ≤ n ≤ 8. It should be noted that it is defined that in the initial state, the spacing value is d, and the opening value at this time is α. Thus, in the working state after the wire is inserted, the distance between the end parts of the two free ends of the elastic member 211 is d + L, and the size of the opening value of the wire insertion space is α - K. And for every 0.1 mm increase in the floating value, the opening value decreases by n angles accordingly. Such a setting relationship makes the inner bending structure different from the prior art and the effect is extremely remarkable.

[0063] In addition, further, the spacing in the initial state and the diameter of the wire insertion hole 14 satisfy the following condition: D = m * d. Wherein, d is the spacing size in the initial state, D is the diameter size of the wire insertion hole 14, and m is a constant and satisfies: 2 ≤ m ≤ 4. It should be noted that the wire insertion hole 14 is configured as a circular hole with a constant diameter of D to adapt to the threading of the wire. And the diameter D of the wire insertion hole 14 is 2 - 4 times larger than the spacing size d, so that the wire specifications that can enter the main body 1 through the wire insertion hole 14 can be adapted to the size parameters of the inner bending structure of the elastic member, effectively screening out the wire specifications that will damage the normal operation of the internal contact frame 2, thereby improving the service life of the wiring clip.

[0064] Among them, it should be mentioned that, as Figure 12 shown, the numerical value of the spacing is the minimum interval distance between the two elastic members 211 at the free ends, and the opening value is the included angle formed by the outer tangents at the two free ends. Thus, the wire that allows external insertion can enter through the wire insertion space with an opening value for guiding, and be inserted into the spacing to elastically clamp the wire on the contact frame 2.

[0065] Please refer to Figure 9 and Figure 10 , in an embodiment, the bottom surface 12 is sunken and arranged in a vertically aligned depression, so that the main body 1 is configured as a hollow-bottomed shell shape. The internal space of the main body includes a first installation cavity 1C and a second installation cavity 1D. The first installation cavity 1C and the second installation cavity 1D form a stepped bottom surface, and the clamping portion of the conductive terminal is located in the second installation cavity 1D to bear part or all of the force of the wire inserted into the conductive terminal. Among them, specifically, at least by sinking the depression, a stepped surface 111 can be formed at the inner wall of the top surface 11, and the stepped surface 111 is higher than the inner wall of the top surface 11. The vertically aligned depression setting meets the conditions for rapid demolding, and the stepped surface 111 is higher than the inner wall of the top surface 11, so that part of the thickness of the top surface 11 is supported by the stepped surface 111, stabilizing the main body 1 while forming an uneven internal space for the clamping and assembly of the conductive terminal.

[0066] It should be mentioned that the convex member 18 is arranged to avoid the inner bending structure of the contact frame 2, and is arranged on the path of the inner bending structure to expand. The convex member 18 is used to limit the inner bending structure to continue to expand and prevent the clamping failure of the clamping joint 21. The convex member 18 is arranged on the activity path of the inner bending structure, and cooperates with the inner bending structure in the initial state in an interval arrangement, so that the inner bending structure can abut against the wire after the wire is inserted and moves to the extreme position.

[0067] In this embodiment, the wire is clamped and fixed by the clamping joint 21 of the contact frame 2. The clamping joint 21 is composed of a pair of elastic members 211, the free ends of the elastic members 211 are configured as inner bending structures, and the two inner bending structures symmetrically arranged on the contact frame 2 can elastically fit the wire on the contact frame 2. More importantly, in order to prevent the clamping elastic force of the inner bending structure from being elastically fatigued and failing, the clamping protrusion 18 arranged on the main body 1 is used to limit the inner bending structure from continuously expanding and preventing the clamping joint 21 from failing.

[0068] Specifically, the clamping protrusion 18 is integrally formed in the second mounting cavity 1D on the step surface 111. The clamping protrusion 18 can be infinitely close to the contact frame 2 assembled in the main body 1, and is spaced apart from the inner bending structure and located in the expansion path. When the inner bending structure moves to the limit position, it can abut against the elastic member 211, fundamentally preventing the leaf spring from elastic fatigue, thereby increasing the service life of the clamping joint 21. It also prevents the inner bending structure from elastically bending beyond the limit position, and can effectively classify the wire specifications suitable for clamping, so as to ensure that the conductive terminal always works normally within the range of movement allowed by the inner bending structure.

[0069] In one embodiment, the cam 18 extends along the length direction to contact the contact frame 2, so as to confine the contact frame 2 in the internal space, and the contact frame 2 is spaced apart from the step surface 111. Thus, the contact frame 2 assembled in the main body 1 can also abut against the position of the cam 18 to ensure that the contact frame 2 is installed in place, and is spaced apart from the step surface 111 to avoid damage to the contact frame 2 during assembly. In addition, preferably, the distance between the cam 18 and the inner bending structure in the initial state is 0.15mm-0.3mm. Such a distance setting allows the inner bending structure to be used normally within its floating value range, and the cam 18 spaced apart on one side of the inner bending structure is set at a preset distance, thereby effectively avoiding the elastic joint 21 from being used beyond the range and ensuring the service life.

[0070] Obviously, the configurations of the through hole 16 , the retaining wall 17 , and the convex member 18 can all satisfy the design concept of facilitating one-time demoulding of the main body 1 along the vertical direction, and will not be elaborated herein.

[0071] Please refer to Figures 14 to 17 , in one embodiment, the clamping portion is configured to enable the contact frame 2 to be snap-fitted into the main body 1 through the two-side wing structure, and the support bottom 22 is horizontally arranged along its length direction on the bottom surface of the main body 1. Thus, the main body 1 is in the shape of a hollow-bottomed shell, so that the contact frame 2 can be assembled into the main body 1 from top to bottom, at least partially blocking the bottom surface of the main body 1, preventing the contact frame 2 from being directly exposed outside the main body 1, and facilitating the disassembly, assembly and combination of the contact frame 2 in the main body 1.

[0072] In one embodiment, the main body 1 is provided with a connecting portion with a clamping surface adapted to the installation side portion 23. The installation side portion 23 and the clamping surface can be tightly fitted in a snap-fit manner. Specifically, a swing arm 231 protrudes outward from the installation side portion 23. The swing arm 231 is formed by stamping a part of the body of the installation side portion 23 and has an inclination angle that is conducive to being inserted into the mating structure. Thus, the swing arm 231 is directly protruded and formed in a part of the body of the installation side portion 23, further enhancing the clamping between the installation side portion 23 and the mating structure, and the swing arm 231 has the function of elastic clamping. The design method is novel, and the set inclination angle is more conducive to the disassembly and assembly of the contact frame 2.

[0073] In one embodiment, it should be noted that the connecting portion is formed by a through hole 16 opened at the top of the main body 1. The through hole 16 penetrates the main body 1 and can be recessed in a part of the inner wall of the main body 1. The swing arm 231 has a first position protruding outside the installation side portion 23 and a second position that is elastically deflected and abutted by the inner wall of the main body 1. The swing arm 231 can remain in the first position in the initial state and when placed on the inner wall recessed with the through hole 16, and can be switched from the first position to the second position when the contact frame 2 is assembled into the main body 1 and abuts against the inner wall of the main body 1, and after being inserted into the inner wall where the through hole 16 is located, the swing arm 231 elastically returns to the first position to limit the contact frame 2 in the main body 1. Through such a configuration method, the swing arm 231 and the connecting portion are more reliable, convenient for assembly and also convenient for disassembly.

[0074] In one embodiment, the swing arm 231 is generally in the shape of a bent plate, which includes a connecting portion 2311 formed at the upper end and connected to the installation side portion 23 and a movable portion 2312 located at the lower end and generally protruding from the end surface where the installation side portion 23 is located. The swing arm 231 is integrally protruded outward from top to bottom, and the inclination angle is 15° - 30°. The movable portion 2312 located at the lower end is more conducive to the assembly method from bottom to top, avoiding phenomena such as jamming or interference. In addition, the protruding swing arm 231 can move freely without interference from the installation side portion 23, and the inclination angle is maintained between the effective thresholds of 15° - 30° to achieve more efficient assembly and disassembly.

[0075] It should be noted that, please refer to Figure 18 and Figure 19 , the wire passing channel formed in the main body 1 is located between the wire insertion hole 14 and the exposure port 15. After the wire enters the wire passing channel through the wire insertion hole 14, the contact frame 2 can clamp the wire and allow the wire to continue to pass through the main body 1 until at least part of the end of the wire passes through the exposure port 15, so that the user can directly observe the wire exposed outside the exposure port 15.

[0076] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention.

Claims

1. A plastic housing for installing a connection terminal, comprising a main body; the main body is constructed as an integrally formed single component; the main body includes a top surface and a bottom surface arranged opposite to each other, and the bottom surface is recessed towards the top surface to form an internal space for accommodating a conductive terminal, and the internal space is provided with a connecting portion for cooperating with a clamping portion of the conductive terminal; a wire insertion hole for inserting a wire into the conductive terminal is provided on the front end surface of the main body, and the wire insertion hole is communicated with the internal space; characterized in that, Taking the maximum width of the wire insertion hole as the limit, cutting and extending downward from the top surface through the bottom surface to form a first cutting surface with the front end surface of the main body and a second cutting surface with the bottom of the main body at the upper and lower positions of the wire insertion hole respectively, and the projections of the first cutting surface and the second cutting surface in the first direction do not overlap; wherein, the maximum width is the maximum width dimension along the transverse direction; looking down at the main body along the first direction, the first cutting surface is formed on the front end surface of the main body, and the second cutting surface is formed on the bottom of the main body.

2. The plastic housing for mounting a connection terminal according to claim 1, characterized in that, The top surface of the main body is cut and extended towards the bottom, and is communicated with the internal space to form the connecting portion.

3. The plastic housing for mounting the connection terminal according to claim 1, wherein The wire insertion hole extends backward and penetrates the rear end surface of the main body so that the inserted wire can penetrate the main body.

4. The plastic housing for installing the connection terminal according to claim 3, characterized in that, The top surface and the bottom surface are surrounded by the side surface to form a hollow shell shape; wherein, The wire insertion hole penetrates through the side surface, and an exposure opening is correspondingly provided at the side surface opposite to the wire insertion hole. The exposure opening is formed by recessing along the outer peripheral edge of a part of the top surface and hollowing out a part of the side surface there, and the wire insertion hole and the exposure opening are both communicated with the internal space.

5. The plastic housing for mounting a connection terminal according to claim 1, wherein, A guiding area is formed on the front end surface of the main body with the wire insertion hole as the center, and the guiding area guides the wire to be inserted into the wire insertion hole.

6. A connection terminal, characterized in that, Including the plastic housing for installing a connection terminal according to any one of claims 1 to 5 and a conductive terminal arranged in the main body; wherein, the main body further includes a partition wall for separating the internal space; the partition wall is horizontally arranged in the main body along the wire insertion direction and divides the internal space into a plurality of sub-spaces for assembling the conductive terminals, and each sub-space has a wire passing channel; the conductive terminal is a contact frame, the contact frame is provided with a clamping joint for inserting a wire and a clamping portion capable of being engaged with the connecting portion of the plastic housing; wherein, the clamping joint is composed of a pair of elastic members, and the free ends of the two elastic members are configured into an inwardly bent structure and symmetrically arranged in the contact frame, so as to elastically cooperate so that the wire can be elastically clamped after entering the wire passing channel along the wire insertion hole opened in the main body.

7. The connection terminal according to claim 6, wherein The contact frame is integrally formed by a metal part, and includes a supporting bottom and an installation side part; the supporting bottom is constructed as a strip-shaped plate and is located below the wire passing channel, and the length direction thereof is consistent with the running direction of the wire passing channel; the installation side part is vertically arranged on both sides of the supporting bottom to form two wing structures, and the contact frame is clamped and assembled in the main body through the two wing structures.

8. The connection terminal according to claim 7, characterized in that, The elastic member is configured as a leaf spring, and the leaf spring is extended and arranged on the installation side portion and points in the opposite direction to the insertion of the wire; the end of the elastic member away from the free end is integrally formed on one side of the installation side portion, and the free end with elastic force lying horizontally on the support bottom is formed by at least one inward bending.

9. The connecting terminal according to claim 8, characterized in that, The width value between the two installation side portions is 1.4 mm - 2.4 mm, and the length value of the inward bending is 0.5 mm - 1.1 mm.

10. The connection terminal according to claim 6, wherein The internal space of the main body includes a first installation cavity and a second installation cavity, the bottom surface of the first installation cavity and the second installation cavity forms a stepped shape, and the clamping portion of the conductive terminal is located in the second installation cavity to bear part or all of the force of the wire inserted into the conductive terminal.

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