Connecting structure and PTC heater

Abstract

The utility model relates to a connecting structure and a PTC heater, the connecting structure comprises a shell and a connecting part, the shell is internally provided with an accommodating cavity for accommodating a PTC heating core body, one end of the shell is provided with a mounting port, the mounting port is communicated with the accommodating cavity, the connecting part comprises a main body section and a connecting section, and the main body section and the connecting section are communicated with each other. The shell and the main body section are connected with the mounting port through the connecting section, the connecting section is provided with a wire hole for a wire harness to penetrate through, and the wire hole is communicated with the accommodating cavity. According to the connecting structure and the PTC heater provided by the utility model, the problems of low connecting efficiency and high production cost of the existing connecting structure are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment, in particular to a connection structure and a PTC heater. Background Art

[0002] There are two main ways to connect the existing PTC heater head wiring harness to the shell: one is to use tape winding, which has the disadvantages of low efficiency and loose connection; the other is to use the slot in the shell and the bellows on the wiring harness to clamp, which requires high precision in the injection molding of the shell, resulting in high production costs, and is not easy to operate during the installation process. Utility Model Content

[0003] The main purpose of the utility model is to provide a connection structure and a PTC heater, aiming to provide a connection structure that can improve the connection efficiency and has a low production cost.

[0004] To achieve the above-mentioned purpose, the utility model proposes a connection structure, including a shell and a connecting part, the shell is provided with a accommodating cavity for accommodating the PTC heating core, one end of the shell is provided with an installation opening, the installation opening is communicated with the accommodating cavity, the connecting part includes a main body section and a connecting section, the shell and the main body section are connected to the installation opening through the connecting section, the connecting part has a wire hole for allowing a wiring harness to pass through, and the wire hole is communicated with the accommodating cavity.

[0005] According to some embodiments of the present invention, the diameter of the connecting section is greater than the diameter of the installation opening.

[0006] According to some embodiments of the present utility model, a first limiting section is convexly disposed on the circumferential side of the main body section, and the first limiting section is located on a side of the connecting section facing the accommodating cavity.

[0007] According to some embodiments of the present utility model, a second limiting section is convexly disposed on the circumferential side of the main body section, and the second limiting section is located on a side of the connecting section that is away from the accommodating cavity.

[0008] According to some embodiments of the present invention, the distance between the first limiting section and the second limiting section is smaller than the thickness of the installation opening.

[0009] According to some embodiments of the utility model, the connecting portion also includes a guide segment for guiding the direction of the wiring harness, wherein the guide segment is disposed at one end of the main body segment away from the installation port, the guide segment extends in a direction away from the installation port, and is bent toward the circumferential side of the main body segment.

[0010] According to some embodiments of the utility model, the shell includes two sub-shells arranged in the thickness direction thereof, the two sub-shells are respectively provided with installation grooves, the two installation grooves are arranged opposite to each other in the thickness direction of the shell, the connecting section is arranged between the two installation grooves, and the two installation grooves are matched and installed to form the installation port.

[0011] According to some embodiments of the present invention, an inner diameter of the wire hole is smaller than a diameter of the wire harness.

[0012] According to some embodiments of the present invention, the connecting portion is made of elastic material.

[0013] In addition, the utility model also provides a PTC heater, comprising a PTC heating core and a connection structure as described in any one of the above items.

[0014] The utility model has at least the following beneficial effects:

[0015] In the utility model, a mounting port is provided at one end of the shell, the mounting port is communicated with the accommodating cavity, the connecting portion includes a main section and a connecting section, the shell and the main section are connected to the mounting port through the connecting section, the connecting portion has a wire hole, the wire harness is passed through the wire hole and extends into the accommodating cavity, and the electrical connection with the PTC heating core in the accommodating cavity can be completed, the connection efficiency is high, and the size of the mounting port of the shell and the size of the wire harness do not need to be limited, as long as the size of the wire harness is smaller than the size of the mounting port of the shell, by changing the size of the connecting section and the inner wall of the wire hole, it can be suitable for the mutual connection of the shell and the wire harness of various sizes, and the production cost is extremely low. The connection structure provided by the utility model solves the problem of low connection efficiency and high production cost of the existing connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A structural schematic diagram of a connection structure provided by an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the connecting part.

[0019] Description of reference numerals:

[0020] 100-connection structure; 1-housing; 11-installation opening; 111-installation groove; 12-subhousing; 2-connecting portion; 21-main section; 211-first limiting section; 212-second limiting section; 22-connection section; 23-guide section. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0024] The utility model provides a connection structure and a PTC heater. Figure 1 to Figure 2 The utility model provides a connection structure and a specific embodiment of a PTC heater.

[0025] like Figure 1 and Figure 2As shown, an embodiment of the utility model provides a connection structure 100, including a shell 1 and a connection part 2, the shell 1 is provided with a accommodating cavity for accommodating a PTC heating core, one end of the shell 1 is provided with a mounting port 11, the mounting port 11 is communicated with the accommodating cavity, the connection part 2 includes a main body section 21 and a connection section 22, the shell 1 and the main body section 21 are connected to the mounting port 11 via the connection section 22, the connection part 2 has a wire hole for a wiring harness to pass through, the wire hole is communicated with the accommodating cavity.

[0026] In the utility model, a mounting opening 11 is provided at one end of the shell 1, the mounting opening 11 is communicated with the accommodating cavity, the connecting portion 2 includes a main section 21 and a connecting section 22, the shell 1 and the main section 21 are connected to the mounting opening 11 through the connecting section 22, the connecting portion 2 has a wire hole, the wire harness is passed through the wire hole and extends into the accommodating cavity, and the electrical connection with the PTC heating core in the accommodating cavity can be completed, the connection efficiency is high, and the size of the mounting opening 11 of the shell 1 and the size of the wire harness do not need to be limited, as long as the size of the wire harness is smaller than the size of the mounting opening 11 of the shell 1, by changing the size of the connecting section 22 and the inner wall of the wire hole, it can be suitable for the mutual connection of the shell 1 and the wire harness of various sizes, and the production cost is extremely low. The connection structure 100 provided by the utility model solves the problem of low connection efficiency and high production cost of the existing connection structure.

[0027] There is no restriction on the size of the connecting section 22, as long as the connecting section 22 and the mounting port 11 are detachably connected. For example, in some embodiments, the diameter of the connecting section 22 is larger than the diameter of the mounting port 11. The connecting section 22 can be clamped on the mounting port 11 through the interference fit between the mounting port 11 and the connecting section 22, so that the shell 1 is connected to the main section 21, and the wiring harness extends from the wire hole of the connecting portion 2 into the accommodating cavity of the shell 1 and is electrically connected to the PTC heating core. The interference fit of the connecting section 22 can also play a certain sealing role to prevent liquid from flowing into the accommodating cavity from the mounting port 11.

[0028] After the wiring harness is electrically connected to the PTC heating core in the accommodating cavity, in order to prevent the main body section 21 from being disconnected from the housing 1, causing the wiring harness to be separated from the housing 1, in some embodiments, Figure 1As shown, the circumferential side of the main body section 21 is convexly provided with a first limiting section 211, and the first limiting section 211 is located on the side of the connecting section 22 facing the accommodating cavity. In this way, the first limiting section 211 limits the main body section 21 from being separated from the housing 1, thereby preventing the wiring harness and the PTC heating core from being forcibly disconnected from each other, resulting in damage to the connection interface between the wiring harness and the PTC heating core.

[0029] It should be noted that the diameter of the first limiting section 211 must be larger than the diameter of the installation opening 11, but the specific size of the first limiting section 211 is not limited. In some embodiments, the diameter of the first limiting section 211 is set to 1.5 to 2.5 times the diameter of the installation opening 11, and the specific size is determined according to actual needs.

[0030] Furthermore, in some embodiments, Figure 1 As shown, the circumferential side of the main body section 21 is convexly provided with a second limiting section 212, and the second limiting section 212 is located on the side of the connecting section 22 facing away from the accommodating cavity. In this way, by setting the second limiting section 212, the main body section 21 is prevented from excessively extending into the accommodating cavity, causing the wiring harness to collide with the PTC heating core.

[0031] Similarly, the diameter of the second limiting section 212 must be larger than the diameter of the installation opening 11, but the specific size of the second limiting section 212 is not limited. In some embodiments, the diameter of the second limiting section 212 is set to 1.2 to 2 times the diameter of the installation opening 11, and the specific size is determined according to actual needs.

[0032] Furthermore, since the connecting section 22 is disposed between the first limiting section 211 and the second limiting section 212, the connecting section 22 is detachably connected to the installation opening 11. In some embodiments, the distance between the first limiting section 211 and the second limiting section 212 is smaller than the thickness of the installation opening 11. In this way, the connecting section 22 and the installation opening 11 are interference-fitted in the axial direction thereof through the first limiting section 211 and the second limiting section 212, and a certain sealing effect is achieved, thereby preventing liquid from flowing from the installation opening 11 into the accommodating cavity.

[0033] Since the wiring harness does not necessarily extend along the axial direction of the connecting portion 2 in actual application scenarios, it needs to be adjusted according to the layout positions of the PTC heater and the wiring harness. In some embodiments, for example Figure 1As shown, the connecting portion 2 further includes a guide section 23 for guiding the direction of the wire harness, the guide section 23 being provided at one end of the main body section 21 away from the installation opening 11, the guide section 23 extending in a direction away from the installation opening 11, and being bent toward the circumferential side of the main body section 21. By providing the guide section 23 to guide the direction of the wire harness, it is applicable to more application scenarios, and avoids forcibly bending the wire harness according to the layout position of the PTC heater, resulting in damage to the wires in the wire harness.

[0034] In some embodiments, the housing 1 includes two sub-housings 12 arranged in the thickness direction thereof, the two sub-housings 12 are respectively provided with mounting grooves 111, the two mounting grooves 111 are arranged opposite to each other in the thickness direction of the housing 1, the connecting section 22 is arranged between the two mounting grooves 111, and the two mounting grooves 111 are installed in cooperation to form the mounting opening 11. In such an arrangement, the connecting portion 2 is first installed in the mounting groove 111 of one of the sub-housings 12, and then the other sub-housing 12 is covered, and the other mounting groove 111 presses the connecting section 22 of the connecting portion 2, so that the connecting section 22 is connected to the mounting opening 11 formed by the two mounting grooves 111.

[0035] Since the wiring harness passes through the wire hole and extends into the accommodating cavity, in order to prevent the wiring harness from moving in the wire hole, in some embodiments, the inner diameter of the wire hole is smaller than the diameter of the wiring harness, and the wiring harness is fixed by an interference fit between the inner wall of the wire hole and the outer wall of the wiring harness.

[0036] The material of the connecting portion 2 is not limited, as long as the connecting section 22 of the connecting portion 2 is detachably connected to the mounting opening 11. For example, in some embodiments, the connecting portion 2 is made of an elastic material. In this way, the connecting section 22 of the elastic material has a sealing effect, which can prevent a gap from appearing when connected to the mounting opening 11, causing liquid to flow from the mounting opening 11 into the accommodating cavity.

[0037] In addition, the utility model also provides a PTC heater, including a PTC heating core and a connecting structure 100, the connecting structure 100 includes a shell 1 and a connecting part 2, the shell 1 is provided with a accommodating cavity for accommodating the PTC heating core, one end of the shell 1 is provided with an installation opening 11, the installation opening 11 is communicated with the accommodating cavity, the connecting part 2 includes a main body section 21 and a connecting section 22, the shell 1 and the main body section 21 are connected to the installation opening 11 through the connecting section 22, the connecting part 2 has a wire hole for a wiring harness to pass through, and the wire hole is communicated with the accommodating cavity.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A connection structure, characterized in that: It includes a shell and a connecting part, the shell is provided with a accommodating cavity for accommodating a PTC heating core, one end of the shell is provided with a mounting port, the mounting port is communicated with the accommodating cavity, the connecting part includes a main body section and a connecting section, the shell and the main body section are connected to the mounting port via the connecting section, the connecting part has a wire hole for a wire harness to pass through, the wire hole is communicated with the accommodating cavity.

2. The connection structure according to claim 1, characterized in that: The diameter of the connecting section is greater than the diameter of the installation opening.

3. The connection structure according to claim 1, characterized in that: A first limiting section is convexly disposed on the circumferential side of the main body section, and the first limiting section is located on a side of the connecting section facing the accommodating cavity.

4. The connection structure according to claim 3, characterized in that: A second limiting section is convexly disposed on the circumferential side of the main body section, and the second limiting section is located on a side of the connecting section facing away from the accommodating cavity.

5. The connection structure according to claim 4, characterized in that: The distance between the first limiting section and the second limiting section is smaller than the thickness of the installation opening.

6. The connection structure according to claim 1, characterized in that: The connecting portion further comprises a guide section for guiding the direction of the wire harness, wherein the guide section is arranged at one end of the main body section away from the installation opening, the guide section extends in a direction away from the installation opening, and is bent toward the circumferential side of the main body section.

7. The connection structure according to claim 1, characterized in that: The shell includes two sub-shells arranged in the thickness direction thereof, the two sub-shells are respectively provided with mounting grooves, the two mounting grooves are arranged opposite to each other in the thickness direction of the shell, the connecting section is arranged between the two mounting grooves, and the two mounting grooves are matched and installed to form the mounting port.

8. The connection structure according to claim 1, characterized in that: The inner diameter of the wire hole is smaller than the diameter of the wire harness.

9. The connection structure according to claim 1, characterized in that: The connecting part is made of elastic material.

10. A PTC heater, characterized in that: The invention comprises a PTC heating core and a connecting structure as claimed in any one of claims 1 to 9.

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