Connecting terminal, PTC electric heater and bath heater

Abstract

The utility model relates to a connecting terminal, a PTC electric heater and a bath heater. The connecting terminal comprises a bottom plate, a first connecting end and a second connecting end. The second connecting end is used for being electrically connected with a sheet electrode and comprises two buckling plates which are arranged on the two sides of the bottom plate and buckled in the direction of the bottom plate, protruding buckling thorns are arranged on the buckling plates, and open holes are formed in the positions, corresponding to the buckling thorns, of the bottom plate. During connection, the sheet-shaped electrode is arranged at the position, close to the bottom plate, of the second connecting end, and the two buckling plates are buckled to the bottom plate, so that the buckling thorns pierce into the sheet-shaped electrode. The buckling thorn arranged on the second connecting end buckling plate can pierce the meat of the connecting terminal into the meat of the sheet-shaped electrode to realize connection, and the crimping terminal and the sheet-shaped electrode are integrated to form a conductor, so that the contact resistance can be effectively reduced. In addition, one end of the buckling thorn terminal is in direct contact with the sheet-shaped electrode, and the other end of the buckling thorn terminal can directly crimp the wire harness, so that the intermediary effect of an O-shaped terminal is avoided, the assembly process is simplified, and the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PTC electric heater technical field especially is a kind of connecting terminal, PTC electric heater and bath heater. BACKGROUND

[0002] PTC electric heater generally has three different structural types, adhesive tape electricity type, adhesive insulation type, tubular insulation type. Among them, the heater of adhesive tape electricity type is generally connected together by the end of wire harness crimping O-shaped terminal through lock screw mode to achieve the function of power-on. This structure, one is that the contact resistance of heat dissipation aluminum strip crimping place is larger, cannot meet the requirement of customer to crimping contact resistance ≤4 milliohm, and too large contact resistance can cause unstable current transmission, power loss increases, and even can cause local overheating, affect the overall performance and life of heater. In addition, the whole assembly process is more complicated and more processes, and the assembly process is complex, time-consuming and laborious, and too much O-shaped terminal is used, and the problems of poor contact and poor stability can occur in long-term use. Therefore, the crimping terminal of prior art cannot meet the requirements of customer to low contact resistance, high production efficiency and high reliability. SUMMARY

[0003] The utility model provides a kind of connecting terminal, PTC electric heater and bath heater, to solve the problem of the contact resistance of heat dissipation aluminum strip crimping place in prior art in the above background technique is larger and assembly process is complex.

[0004] A connecting terminal, comprising:

[0005] A bottom plate;

[0006] A first connecting end, located at one end of the bottom plate, for electrically connecting a wire;

[0007] A second connecting end, located at the other end of the bottom plate, for electrically connecting a sheet electrode, comprising two clamping plates arranged on both sides of the bottom plate and clamped towards the bottom plate, the clamping plates are provided with protruding clamping spikes, and the bottom plate is provided with an opening corresponding to the position of the clamping spikes.

[0008] When connecting, the sheet electrode is placed close to the bottom plate at the second connecting end, and the two clamping plates are clamped towards the bottom plate, so that the clamping spikes are pierced into the sheet electrode.

[0009] Preferably, the clamping spikes pierce the sheet electrode and are inserted into the corresponding openings when clamped.

[0010] Preferably, the width of the second connecting end is at least greater than the width of the sheet electrode.

[0011] Preferably, a vertical plate is arranged at the joint of the fastening plate and the bottom plate, and the height of the vertical plate matches the thickness of the sheet-shaped electrode, so that the fastening plate has a space for accommodating the sheet-shaped electrode when fastened to be parallel to the bottom plate.

[0012] Preferably, a plurality of fastening spikes are arranged on each fastening plate, and a plurality of openings corresponding to the fastening spikes are arranged on the bottom plate.

[0013] Preferably, the fastening spike is a circular ring formed by a group of protruding teeth.

[0014] Preferably, the fastening spike comprises 6-8 teeth, and the height of the teeth is between 0.5-2mm.

[0015] Preferably, a crimping plate is arranged on each side of the first connecting end, the crimping plate comprises a first crimping plate for crimping a copper wire of an electric wire and a second crimping plate for crimping the electric wire, and the height of the first crimping plate is less than the height of the second crimping plate.

[0016] A PTC electric heater comprises:

[0017] A heater body;

[0018] A sheet-shaped aluminum strip heat-dissipating electrode arranged on a side edge of the heater body; and

[0019] A connecting terminal as described above;

[0020] The sheet-shaped aluminum strip heat-dissipating electrode is fastened on the second connecting end of the connecting terminal by the fastening plate.

[0021] A shower heater comprising the PTC electric heater as described above.

[0022] The above technical solution of the utility model has the following advantages compared with the prior art: first, the fastening spike arranged on the connecting terminal can be inserted into the meat of the sheet-shaped electrode to realize connection, the fastening spike can make the crimping terminal and the sheet-shaped electrode become an integral whole through closer physical contact, thereby forming a conductor, and the contact resistance can be effectively reduced. In addition, one end of the fastening spike terminal directly contacts the sheet-shaped electrode, and the other end can directly crimp the wire harness, the intermediary role of the O-shaped terminal is avoided, the assembly process is simplified, and the production efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to make the content of the utility model more easily and clearly understood, the utility model will be further described in detail below according to the specific embodiments of the utility model and in combination with the drawings.

[0024] Figure 1 is a schematic view of the connecting terminal of the utility model.

[0025] Figure 2 is a schematic view of the PTC electric heater of the utility model.

[0026] Figure 3 is a partial enlarged view of the PTC electric heater of the utility model.

[0027] Description of the Drawings: 1, connecting terminal; 11, bottom plate; 12, vertical plate; 13, buckling plate; 14, buckling; 15, first pressure plate; 16, second pressure plate; 17, tooth; 18, opening; 2, PTC electric heater; 21, heat dissipation aluminum strip anode; 22, heater body. DETAILED DESCRIPTION

[0028] The utility model will be further described below in combination with the drawings and specific embodiments, so that the skilled in the art can better understand the utility model and can be implemented, but the embodiments are not as the limitation of the utility model.

[0029] As shown in Figure 1 , the utility model connecting terminal 1 includes:

[0030] Bottom plate 11;

[0031] First connecting end, located at one end of the bottom plate 11, for electrically connecting a wire;

[0032] Second connecting end, located at the other end of the bottom plate 11, for electrically connecting a sheet electrode, including two buckling plates 13, which are arranged on both sides of the bottom plate 11 and buckled to the bottom plate 11, the buckling plate 13 is provided with protruding buckling 14, and the bottom plate 11 is provided with opening 18 at the position corresponding to the buckling 14;

[0033] When connecting, the sheet electrode is placed at the second connecting end close to the bottom plate 11, and the two buckling plates 13 are buckled to the bottom plate 11, so that the buckling 14 is pierced into the sheet electrode meat.

[0034] In an optional embodiment, the buckling 14 pierces the sheet electrode and is buckled into the corresponding opening 18.

[0035] In an optional embodiment, the width of the second connecting end is at least greater than the width of the sheet electrode.

[0036] In an alternative embodiment, a vertical plate 12 is arranged at the joint between the fastening plate 13 and the bottom plate 11, the height of the vertical plate 12 matches the thickness of the sheet-shaped electrode, so that the fastening plate 13 has a space for accommodating the sheet-shaped electrode when fastened to be parallel to the bottom plate 11. The height of the vertical plate 12 is between 0.5-2mm; preferably, the height of the vertical plate 12 is 1mm. It should be noted that the height of the vertical plate 12 is only an example in the embodiment of the present application, and in fact, the height of the vertical plate 12 is determined by the thickness of the inserted sheet-shaped electrode, and the height of the vertical plate 12 is not limited in the embodiment of the present application.

[0037] In an alternative embodiment, a plurality of fastening spikes 14 are arranged on each of the fastening plates 13, and a plurality of openings 18 corresponding to the plurality of fastening spikes 14 are arranged on the bottom plate 11. Preferably, two fastening spikes 14 are arranged on the fastening plate 13. It should be noted that the number of fastening spikes 14 on the fastening plate 13 is only an example in the embodiment of the present application, and in fact, the number of fastening spikes 14 on the fastening plate 13 is determined by the area and volume of the inserted sheet-shaped electrode, and the number of fastening spikes 14 on the fastening plate 13 is not limited in the embodiment of the present application.

[0038] In an alternative embodiment, the fastening spike 14 is a circular ring surrounded by a group of protruding teeth 17.

[0039] In an alternative embodiment, the fastening spike 14 includes 6-8 teeth 17, and the height of the teeth 17 is between 0.5-2mm; preferably, the fastening spike 14 includes 8 teeth 17, and the height of the teeth 17 is 1mm. It should be noted that the height and number of teeth 17 are only an example in the embodiment of the present application, and in fact, the number of teeth 17 is determined by the area and volume of the inserted sheet-shaped electrode, and the number of teeth 17 is not limited in the embodiment of the present application.

[0040] In an alternative embodiment, a crimping plate is arranged on both sides of the first connecting end, the crimping plate includes a first crimping plate 15 for crimping the copper wire of the wire and a second crimping plate 16 for crimping the wire, and the height of the first crimping plate 15 is smaller than the height of the second crimping plate 16.

[0041] The main innovation of the utility model connection terminal 1 is that the fastening plate 13 of the second connecting end of the connection terminal 1 is provided with a fastening spike 14, the fastening spike 14 can be inserted into the flesh of the sheet-shaped electrode to form part of the sheet-shaped electrode body, and the connection terminal 1 and the sheet-shaped electrode become an integral whole, thereby forming a conductor, which can effectively reduce the contact resistance.

[0042] As Figure 2 and 3The utility model also provides a PTC electric heater 2, including:

[0043] The heater body 22;

[0044] The heat dissipation aluminum strip lead pole 21 is sheet electrode, is arranged on the side of the heater body 22, and

[0045] The connecting terminal 1 as described above;

[0046] The heat dissipation aluminum strip lead pole 21 is fixed on the second connecting end of the connecting terminal 1 by the buckling plate 13.

[0047] A bath heater, the bath heater includes the PTC electric heater 2 as described above.

[0048] In order to verify the feasibility of the above technical scheme, the contact resistance of the heat dissipation aluminum sheet lead pole 21 of the PTC electric heater 2 is tested by the existing technology terminal crimping and the utility model connecting terminal 1 crimping, and the contact resistance of the five crimping terminals on each PTC electric heater 2 is tested respectively, and the experimental results are as follows:

[0049] Table 1 comparison of contact resistance (mΩ) of existing technology terminal crimping and utility model connecting terminal 1

[0050]

[0051] As can be seen from the above table data, the contact resistance of the heat dissipation aluminum sheet lead pole 21 of the PTC electric heater 2 connected by the utility model connecting terminal 1 is below 1 milliohm, which can meet the customer's requirement that the contact resistance of the heat dissipation aluminum strip crimping is less than or equal to 4 milliohm.

[0052] The utility model has the following beneficial effects compared with the prior art: first, the connecting terminal 1 is provided with a buckling thorn 14, the buckling thorn 14 can penetrate the meat of the sheet electrode, and the buckling thorn 14 can make the crimping terminal and the sheet electrode become one by closer physical contact, so as to form a conductor, which can effectively reduce the contact resistance. Second, one end of the buckling thorn 14 terminal directly contacts the sheet electrode, and the other end can directly crimp the wire harness, avoiding the intermediary role of the O-shaped terminal. In this way, the entire assembly process is greatly simplified, and only one crimping operation is needed to complete the connection, greatly improving the production efficiency. In addition, since the buckling thorn 14 can penetrate the surface of the sheet electrode, the mechanical engagement force formed thereby can effectively resist the influence of thermal expansion and vibration, avoiding the problem of loose contact point or increased resistance. The buckling thorn 14 structure can adapt to slight deformation, ensuring stable electrical connection during long-term use, thereby prolonging the service life of the heater.

[0053] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A connecting terminal, characterized in that, include: Base plate; The first connection end, located at one end of the base plate, is used for electrically connecting a wire; The second connection end, located at the other end of the base plate, is used to electrically connect a sheet electrode. It includes two fastening plates, which are disposed on both sides of the base plate and fasten towards the base plate. The fastening plates are provided with protruding fastening spikes, and the base plate is provided with openings at the positions corresponding to the fastening spikes. During connection, the sheet electrode is placed near the base plate at the second connection end, and the two fastening plates are fastened to the base plate so that the fastening pierces are inserted into the flesh of the sheet electrode.

2. The connection terminal according to claim 1, characterized in that, The puncture bar pierces the sheet electrode and inserts into the corresponding opening when fastened.

3. The connection terminal according to claim 1, characterized in that, The width of the second connection end is at least greater than the width of the sheet electrode.

4. The connection terminal according to claim 1, characterized in that, A vertical plate is provided at the connection between the fastening plate and the base plate. The height of the vertical plate matches the thickness of the sheet electrode, so that the fastening plate has space to accommodate the sheet electrode when it is fastened to be parallel to the base plate.

5. The connection terminal according to claim 1, characterized in that, Each of the fastening plates includes multiple buckles, and the base plate is provided with multiple openings corresponding to the multiple buckles.

6. The connecting terminal according to claim 1, characterized in that, The buckle is a ring formed by a set of protruding teeth.

7. The connecting terminal according to claim 6, characterized in that, The buckle has 6-8 teeth, and the height of the teeth is between 0.5-2mm.

8. The connecting terminal according to claim 1, characterized in that, A crimping plate is provided on both sides of the first connecting end. The crimping plate includes a first crimping plate for crimping copper wires of the wire and a second crimping plate for crimping the wire. The height of the first crimping plate is less than the height of the second crimping plate.

9. A PTC electric heater, characterized in that, include: Heater body; A heat-dissipating aluminum strip lead, wherein the heat-dissipating aluminum strip lead is a sheet-shaped electrode and is disposed on the side of the heater body; as well as The connection terminal as described in any one of claims 1-8; The heat dissipation aluminum strip lead is fastened and fixed to the second connection end of the connection terminal by the fastening plate.

10. A bathroom heater, characterized in that: The bathroom heater includes the PTC electric heater as described in claim 9.

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