Conductor sheet fixing structure and PTC water heater

Abstract

The utility model provides a conductor sheet fixing structure and a PTC water heater, the conductor sheet fixing structure comprises a conductor sheet body and a conduction plate, and the conductor sheet body is convexly provided with a plurality of elastic buckle parts; the conduction plate is provided with a plurality of clamping holes in one-to-one correspondence with the elastic buckling parts, and the elastic buckling parts are inserted into the clamping holes respectively and buckled on the conduction plate. According to the utility model, the original plastic buckling structure on the conduction plate is canceled, the clamping hole is arranged on the conduction plate, the original hole structure on the conductor sheet body is canceled, the elastic buckling part is arranged on the conductor sheet body, and the elastic buckling part can be set to be higher; according to the utility model, the elastic buckling part is arranged on the conductive plate, so that the elastic buckling part has enough elastic deformation amplitude when being inserted into the clamping hole and buckled on the conductive plate, thereby ensuring that the elastic buckling part has good elastic deformation, reducing the assembling stress of the conductor sheet body and the conductive plate, improving the assembling convenience of the conductor sheet body and the conductive plate, and improving the reliability of the conductor sheet body. And whether the assembly is in place or not can be judged through the assembly sound.

Description

TECHNICAL FIELD

[0001] The utility model relates to PTC water heating technical field especially relates to a conductor sheet fixing structure and PTC water heater. BACKGROUND

[0002] At present, for PTC water heater product, when it has control demand, usually adopt the form of multichannel IGBT control, under this background, the passage that PTC sheet connects to PCBA upper also adopts the form of busbar conductor sheet to realize, and the conductor sheet needs to have specific insulating conducting board to support. At this time, the fitting structure of conductor sheet and conducting board needs to be considered specially, needs to give consideration to following two functions: 1, conductor sheet and conducting board reliable connection, satisfy mechanical reliability such as shock resistance, 2, assembly convenience, need to guarantee to have obvious structural feedback when assembling, to confirm assembly in place, and need to have positioning features and other elements to optimize assembly action.

[0003] At present, the connection form of industry general conductor sheet and conducting board is mostly realized by the cooperation of the hole position of conductor sheet and the buckle position of conducting board, however, this connection structure has following problems: 1, conductor sheet is usually thin, within 1mm thickness, so need to match the height of buckle position is very short, and the buckle position height of conducting board is short, will cause the elastic deformation amplitude of buckle position is very small when cooperation assembly, thereby the assembly stress is big, there is the problem of big assembly force and difficult assembly, 2, the buckle position of conducting board is short, will derive another assembly risk, when having individual buckle position not buckled in place during the assembly process, it is not easy to find abnormality, will bring the risk of electrical connection reliability of complete machine.

[0004] Therefore, it is necessary to provide a conductor sheet fixing structure that can improve assembly convenience and determine whether assembly is in place through assembly sound, and a PTC water heater with the conductor sheet fixing structure. INVENTION CONTENTS

[0005] The first purpose of the utility model is to provide a conductor sheet fixing structure that can improve assembly convenience and determine whether assembly is in place through assembly sound.

[0006] The second purpose of the utility model is to provide a PTC water heater with the conductor sheet fixing structure that can improve assembly convenience and determine whether assembly is in place through assembly sound.

[0007] To realize the above-mentioned first purpose, the utility model provides a conductor sheet fixing structure, comprising conductor sheet body and conducting board, a plurality of elastic buckle parts are protruded on the conductor sheet body, a plurality of card holes corresponding to the elastic buckle parts are arranged on the conducting board, and the elastic buckle parts are inserted into the card holes and buckled on the conducting board.

[0008] Compared with the prior art, the conductor sheet fixing structure cancels the original plastic buckle structure on the conducting plate, sets the clamping hole on the conducting plate, cancels the original hole structure on the conductor sheet body, sets the elastic buckle part on the conductor sheet body, the elastic buckle part can be set to have a higher height, the elastic buckle part has sufficient elastic deformation amplitude when being inserted into the clamping hole and buckled on the conducting plate, the elastic buckle part has good elastic deformation, the assembly stress of the conductor sheet body and the conducting plate is reduced, the assembly convenience of the conductor sheet body and the conducting plate is improved, and whether the conductor sheet body and the conducting plate are assembled in place can be judged through the assembly sound; meanwhile, the elastic buckle part on the conductor sheet body can be set to have a higher height, when the elastic buckle part and the clamping hole are missed, there is a obvious protrusion between the conductor sheet body and the conducting plate, and the judgment of abnormal assembly is facilitated.

[0009] Preferably, the elastic buckle part comprises a first elastic buckle body and a second elastic buckle body, the first elastic buckle body and the second elastic buckle body are respectively arranged on the conductor sheet body, and the first elastic buckle body and the second elastic buckle body are synchronously inserted through the clamping hole and buckled on the conducting plate.

[0010] Preferably, the conductor sheet body is provided with a first opening at a position corresponding to the first elastic buckle body, the conductor sheet body is provided with a second opening at a position corresponding to the second elastic buckle body, one end of the first elastic buckle body is integrally connected to one of the inner side walls of the first opening, the other end of the first elastic buckle body is bent to extend out of the first opening, one end of the second elastic buckle body is integrally connected to one of the inner side walls of the second opening, and the other end of the second elastic buckle body is bent to extend out of the second opening.

[0011] Preferably, the first elastic buckle body and the second elastic buckle body are symmetrically distributed on the conductor sheet body.

[0012] Preferably, the clamping hole is in a long slot structure, the elastic buckle part is in a sheet structure, and the elastic buckle part is tightly inserted into the clamping hole.

[0013] Preferably, the conductor sheet body is provided with a plurality of elastic buckle parts, and the conducting plate is provided with a plurality of clamping holes corresponding to the elastic buckle parts one by one.

[0014] Preferably, the conductor sheet fixing structure further comprises a PCBA piece, the PCBA piece is connected to the conducting plate, and the PCBA piece is located on one side of the conducting plate, the conductor sheet body is located on the other side of the conducting plate, the conductor sheet body is provided with a first lug, the first lug penetrates through the conducting plate and is inserted into the PCBA piece.

[0015] Preferably, the conductor sheet fixing structure further comprises a solder-free terminal, the PCBA piece is provided with a socket, and the pin of the solder-free terminal is inserted into the socket.

[0016] Preferably, the solder-free terminal is arranged above the PCBA piece, the pin of the solder-free terminal extends downward and is inserted into the socket.

[0017] To achieve the above-mentioned second object, the utility model provides a kind of PTC water heater, including lower shell, heating mounting seat, heating module and above-mentioned conductor sheet fixing structure, the lower shell is provided with cavity, the heating mounting seat is installed on the lower shell and closes the cavity, a plurality of the heating module is installed in heating mounting seat, the conducting plate is installed above the heating mounting seat, and the heating module is connected with the conductor sheet body.

[0018] Compared with prior art, the PTC water heater of the utility model is provided with conductor sheet fixing structure, the conductor sheet fixing structure is provided with clamping hole on conducting plate by canceling original plastic buckle structure on conducting plate, and elastic buckle part is arranged on conductor sheet body by canceling original hole position structure on conductor sheet body, elastic buckle part can be arranged with higher height, so that when elastic buckle part is inserted into the clamping hole and buckled on the conducting plate, it has enough elastic deformation range, which ensures that elastic buckle part has good elastic deformation, thereby reducing the assembly stress of conductor sheet body and conducting plate, improving the assembly convenience of conductor sheet body and conducting plate, and whether conductor sheet body and conducting plate are assembled in place can be judged by assembling sound; simultaneously, since elastic buckle part on conductor sheet body can be arranged with higher height, when there is elastic buckle part and clamping hole missing, there will be obvious protrusion between conductor sheet body and conducting plate, which facilitates the judgment of abnormal assembly.

[0019] Preferably, the heating module has a second lug, the conductor sheet body is provided with a plurality of elastic clamping jaw parts, and the second lug is inserted into the elastic clamping jaw parts.

[0020] Preferably, the elastic clamping jaw part comprises at least two elastic clamping body, each of the elastic clamping body has an insertion gap, and the second lug is inserted into the insertion gap.

[0021] Preferably, the conducting plate is provided with a plurality of through holes corresponding to the elastic clamping portions, and the second lugs are inserted into the through holes through the insertion gaps.

[0022] Preferably, the conductor sheet body is provided with third openings corresponding to the elastic clamping body positions, one end of each of the elastic clamping bodies is integrally connected to opposite inner side walls of the third openings, and the other end of each of the elastic clamping bodies is bent to extend out of the third openings.

[0023] Preferably, the heating module comprises a U-shaped clamping sheet, a PI composite film, a PTC support, PTC sheets, and an electrode sheet, the PI composite film is arranged in the U-shaped clamping sheet, the PTC support is arranged in the PI composite film, the PTC support is provided with a receiving cavity, a plurality of the PTC sheets are arranged in the receiving cavity, the electrode sheet is arranged in the PI composite film, the electrode sheet is connected with the PTC support and covers the receiving cavity, and the two second lugs are protruded on the PTC support and the electrode sheet.

[0024] Preferably, the heating mounting seat is provided with a plurality of mounting grooves, each of the heating modules is arranged in each of the mounting grooves, and the U-shaped clamping sheet has an elastic structure and elastically abuts against the inner wall of the mounting groove.

[0025] Preferably, the electrode sheet is in a conical shape, and the electrode sheet and the PTC support are connected to form a conical structure.

[0026] Preferably, the heating module comprises a PTC support, a first ceramic substrate, a first electrode sheet, PTC sheets, a second electrode sheet, and a second ceramic substrate arranged in sequence in the same direction, the PTC support is provided with a receiving cavity, the PTC support, the first ceramic substrate, the first electrode sheet, the PTC sheets, and the second electrode sheet are located in the receiving cavity, the second ceramic substrate is connected to the PTC support and covers the second electrode sheet, and the two second lugs are protruded on the first electrode sheet and the second electrode sheet. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of a conductor sheet fixing structure of the utility model.

[0028] Figure 2 is Figure 1 is an enlarged view of A in figure.

[0029] Figure 3 is Figure 1 is an exploded view of the conductor sheet fixing structure shown in figure.

[0030] Figure 4 isFigure 3 Enlarged view of the middle B.

[0031] Figure 5 is a perspective view of another embodiment of the conductor sheet fixing structure of the utility model.

[0032] Figure 6 is a connection structure diagram of the PCBA and the solder-free terminal of the utility model.

[0033] Figure 7 is Figure 6 Enlarged view of the middle C.

[0034] Figure 8 is a perspective view of the PTC water heater of the utility model.

[0035] Figure 9 is Figure 8 Expedited diagram of the PTC water heater shown in the figure.

[0036] Figure 10 is a partial structure diagram of the PTC water heater of the utility model.

[0037] Figure 11 is Figure 10 Enlarged view of the middle D.

[0038] Figure 12 is a perspective view of the first embodiment of the heating module of the utility model.

[0039] Figure 13 is Figure 12 Expedited diagram of the heating module shown in the figure.

[0040] Figure 14 is a perspective view of the second embodiment of the heating module of the utility model.

[0041] Figure 15 is Figure 14 Expedited diagram of the heating module shown in the figure.

[0042] Figure 16 is a perspective view of the third embodiment of the heating module of the utility model.

[0043] Figure 17 is Figure 16 Expedited diagram of the heating module shown in the figure. DETAILED DESCRIPTION

[0044] In order to explain the technical content and structural features of the utility model in detail, the following further explanation is made in combination with the embodiments and the accompanying drawings.

[0045] Please refer to Figures 1 to 4The utility model provides a kind of conductor sheet fixed structure 100, it includes conductor sheet body 1 and lead-through plate 2, and several elastic buckle parts 11 are protruded on conductor sheet body 1;Lead-through plate 2 is equipped with several card holes 21 corresponding with elastic buckle part 11 one by one, each elastic buckle part 11 is inserted into each card hole 21 and buckled on lead-through plate 2 respectively.Concretely, conductor sheet body 1 is arranged below lead-through plate 2, and the quantity of conductor sheet body 1 is several, for example, one, two or three etc., but not limited to this.

[0046] The utility model discloses a conductor sheet fixed structure 100 is set up card hole 21 on lead-through plate 2, and elastic buckle part 11 is set up on conductor sheet body 1, so that conductor sheet body 1 is clamped on the card hole 21 of lead-through plate 2 by elastic buckle part 11, to assemble conductor sheet body 1 and lead-through plate 2 together.Because elastic buckle part 11 is arranged on conductor sheet body 1, elastic buckle part 11 can be set higher height, so that elastic buckle part 11 has enough elastic deformation amplitude when being inserted into card hole 21 and buckled on lead-through plate 2, guarantee that elastic buckle part 11 has good elastic deformation, to reduce the assembly stress of conductor sheet body 1 and lead-through plate 2, improve the assembly convenience of conductor sheet body 1 and lead-through plate 2, and whether conductor sheet body 1 and lead-through plate 2 are assembled in place can be judged by assembling sound;Meanwhile, because elastic buckle part 11 on conductor sheet body 1 can be set higher height, when there is elastic buckle part 11 and card hole 21 missing, there will be obvious protrusion between conductor sheet body 1 and lead-through plate 2, and the judgment of abnormal assembly is facilitated.

[0047] Please refer to Figure 2 And Figure 4In an embodiment, the elastic buckle part 11 comprises a first elastic buckle body 111 and a second elastic buckle body 112, the first elastic buckle body 111 and the second elastic buckle body 112 are respectively arranged on the conductor sheet body 1, and the first elastic buckle body 111 and the second elastic buckle body 112 are synchronously inserted through the buckle hole 21 and buckled on the conducting plate 2. However, this is not limiting, for example, in some alternative embodiments, the elastic buckle part 11 can also only use the first elastic buckle body 111 or the second elastic buckle body 112. Specifically, the conductor sheet body 1 is provided with a first opening 12 at a position corresponding to the first elastic buckle body 111, the conductor sheet body 1 is provided with a second opening 13 at a position corresponding to the second elastic buckle body 112, one end of the first elastic buckle body 111 is integrally connected to one of the inner side walls of the first opening 12, the other end of the first elastic buckle body 111 is bent and extends out of the first opening 12, one end of the second elastic buckle body 112 is integrally connected to one of the inner side walls of the second opening 13, and the other end of the second elastic buckle body 112 is bent and extends out of the second opening 13. More specifically, the first elastic buckle body 111 and the second elastic buckle body 112 are symmetrically distributed on the conductor sheet body 1, but this is not limiting.

[0048] In another alternative embodiment, the buckle hole 21 has a long slit structure, and the elastic buckle part 11 has a sheet structure, and the elastic buckle part 11 is tightly inserted into the buckle hole 21.

[0049] Please refer to Figure 3 and Figure 5 In an embodiment, the conductor sheet fixing structure 100 of the utility model further comprises a PCBA piece 3, the PCBA piece 3 is connected to the conducting plate 2, and the PCBA piece 3 is located on one side of the conducting plate 2, the conductor sheet body 1 is located on the other side of the conducting plate 2, the conductor sheet body 1 is provided with a first lug 16, the first lug 16 passes through the conducting plate 2 and is inserted into the PCBA piece 3. Specifically, the PCBA piece 3 is arranged above the conducting plate 2, but this is not limiting. Among them, the conducting plate 2 can be provided with an elastic claw at the position for the first lug 16 to pass through, so as to position the first lug 16, and the PCBA piece 3 can be provided with a connecting hole for the first lug 16 to be inserted therein, so as to realize electrical connection, but this is not limiting.

[0050] Please refer to Figures 5 to 7 In an embodiment, the conductor sheet fixing structure 100 of the utility model further comprises a solderless terminal 4, the PCBA piece 3 is provided with a insertion hole 31, and the pin 41 of the solderless terminal 4 is inserted into the insertion hole 31. Specifically, the solderless terminal 4 is arranged above the PCBA piece 3, and the pin 41 of the solderless terminal 4 extends downward and is inserted into the insertion hole 31.

[0051] Please refer to Figures 8 to 10The utility model also provides a kind of PTC water heater 200, it includes lower shell 201, heating mounting seat 202, heating module 203 and the conductor sheet fixed structure 100 of any embodiment above, lower shell 201 is equipped with cavity 201a, heating mounting seat 202 is installed on lower shell 201 and closes cavity 201a, several heating module 203 are installed in heating mounting seat 202, conducting plate 2 is installed in the top of heating mounting seat 202, and heating module 203 is connected with conductor sheet body 1.

[0052] Please refer to Figures 9 to 11 In an embodiment, heating module 203 has second lug 203a, and conductor sheet body 1 is protruded with several elastic clamping jaw parts 14, and second lug 203a is inserted in elastic clamping jaw part 14.Specifically, elastic clamping jaw part 14 includes at least two elastic clamping jaw bodies 141, and each elastic clamping jaw body 141 has insertion gap 142 between each other, and second lug 203a is inserted in insertion gap 142.More specifically, conductor sheet body 1 is provided with third opening 15 at the position corresponding to elastic clamping jaw body 141, and one end of each elastic clamping jaw body 141 is integrally connected to the opposite two inner side walls of third opening 15 respectively, and the other end of each elastic clamping jaw body 141 is bent and extends out of third opening 15.In this embodiment, the number of elastic clamping jaw bodies 141 is three, one end of two elastic clamping jaw bodies 141 is connected to the same inner side wall of third opening 15, and the other end of the remaining one elastic clamping jaw body 141 is connected to the opposite inner side wall of third opening 15, wherein the elastic clamping jaw bodies 141 on the opposite two inner side walls of third opening 15 are staggered, but not limited thereto.

[0053] Please refer to Figure 11 In an embodiment, conducting plate 2 is provided with several through holes 22 corresponding to elastic clamping jaw part 14 one by one, and second lug 203a passes through insertion gap 142 and is inserted into through hole 22.Heating module 203 The second lug 203a of is inserted into the insertion gap 142 between the elastic clamping jaw bodies 141 of conductor sheet, realizes structure fastening, and realizes electrical connection at the same time.

[0054] Please refer to Figures 12 to 15In an embodiment, the heating module 203 comprises a U-shaped clamping sheet 203b, a PI composite film 203c, a PTC bracket 203d, a PTC sheet 203e, and an electrode sheet 203f. The PI composite film 203c is arranged in the U-shaped clamping sheet 203b, the PTC bracket 203d is arranged in the PI composite film 203c, the PTC bracket 203d is provided with a receiving cavity 203d1, a plurality of PTC sheets 203e are arranged in the receiving cavity 203d1, the electrode sheet 203f is arranged in the PI composite film 203c, the electrode sheet 203f is connected with the PTC bracket 203d and covers the receiving cavity 203d1, and the two second lugs 203a are respectively protruded on the PTC bracket 203d and the electrode sheet 203f.

[0055] In an alternative embodiment, as shown in Figure 12 and Figure 13 , the electrode sheet 203f is connected with the PTC bracket 203d to form a rectangular structure. Specifically, the PI composite film 203c is U-shaped, the opposite two sides of the PI composite film 203c are perpendicular to the bottom side, and the rectangular structure formed by the assembly of the PTC bracket 203d, the PTC sheet 203e, and the electrode sheet 203f is inserted into the U-shaped space of the PI composite film 203c; the opposite two sides of the U-shaped clamping sheet 203b are perpendicular to the bottom side, the PI composite film 203c is inserted into the U-shaped space of the U-shaped clamping sheet 203b, and the opposite two sides of the U-shaped clamping sheet 203b are respectively attached to the opposite two sides of the PI composite film 203c.

[0056] More specifically, as shown in Figure 9 and Figure 12 , the heating mounting seat 202 is provided with a plurality of mounting grooves 202a, each heating module 203 is arranged in each mounting groove 202a, and the U-shaped clamping sheet 203b has a resilient structure and elastically abuts against the inner wall of the mounting groove. The upper side of the U-shaped clamping sheet 203b is provided with a spring sheet, which is the resilient structure of the U-shaped clamping sheet 203b, and the U-shaped clamping sheet 203b elastically abuts against the inner wall of the mounting groove 202a through the spring sheet. The outer side wall of the U-shaped clamping sheet 203b is provided with a strip-shaped supporting block, which can also abut and support on the inner wall of the mounting groove 202a. The gap between the U-shaped clamping sheet 203b and the inner wall of the mounting groove 202a can be filled with heat-conducting glue to achieve the effect of heat conduction.

[0057] In an alternative embodiment, as shown in Figure 14 and Figure 15As shown, the electrode sheet 203f is in a conical shape, and the electrode sheet 203f is connected with the PTC support 203d to form a conical structure. Specifically, the PI composite film 203c is in a conical shape, and the opposite two side edges of the PI composite film 203c are inclined outward relative to the bottom edge. The conical structure formed by the PTC support 203d, the PTC sheet 203e and the electrode sheet 203f is inserted into the conical space of the PI composite film 203c. The opposite two side edges of the U-shaped clamping sheet 203b are inclined outward relative to the bottom edge, and the PI composite film 203c is inserted into the conical space of the U-shaped clamping sheet 203b, and the opposite two side edges of the U-shaped clamping sheet 203b are respectively attached to the opposite two side edges of the PI composite film 203c.

[0058] Referring to Figure 16 and Figure 17 In an embodiment, the heating module 203 comprises, in sequence along the same direction, the PTC support 203d, the first ceramic substrate 203g, the first electrode sheet 203f1, the PTC sheet 203e, the second electrode sheet 203f2 and the second ceramic substrate 203h. The PTC support 203d is provided with a receiving cavity 203d1, and the PTC support 203d, the first ceramic substrate 203g, the first electrode sheet 203f1, the PTC sheet 203e and the second electrode sheet 203f2 are located in the receiving cavity 203d1. The second ceramic substrate 203h is connected to the PTC support 203d and covers the second electrode sheet 203f2. The two second lugs 203a are respectively protruded on the first electrode sheet 203f1 and the second electrode sheet 203f2.

[0059] Referring to Figures 8 to 10 In an embodiment, the PTC water heater 200 further comprises an upper shell 204, which is installed above the lower shell 201 and covers the heating mounting seat 202 and the conductor sheet fixing structure 100.

[0060] In summary, the PTC water heater 200 is provided with the conductor sheet fixing structure 100, the conductor sheet fixing structure 100 cancels the original plastic buckle structure on the conducting plate 2, and sets the clamping hole 21 on the conducting plate 2, cancels the original hole structure on the conductor sheet body 1, and sets the elastic buckle part 11 on the conductor sheet body 1, the elastic buckle part 11 can be set to a higher height, so that the elastic buckle part 11 has sufficient elastic deformation amplitude when being inserted into the clamping hole 21 and buckled on the conducting plate 2, the elastic buckle part 11 has good elastic deformation, thereby reducing the assembly stress of the conductor sheet body 1 and the conducting plate 2, improving the assembly convenience of the conductor sheet body 1 and the conducting plate 2, and the assembly of the conductor sheet body 1 and the conducting plate 2 can be judged through the assembled sound, and the conductor sheet body 1 and the conducting plate 2 are assembled in place; at the same time, the elastic buckle part 11 on the conductor sheet body 1 can be set to a higher height, when the elastic buckle part 11 and the clamping hole 21 are missing, there will be a obvious protrusion between the conductor sheet body 1 and the conducting plate 2, which is convenient for judging the assembly exception. Secondly, the elastic buckle part 11 of the conductor sheet body 1 passes through the clamping hole 21 and is buckled on the conducting plate 2, when assembling, the elastic buckle part 11 of the conductor sheet body 1 will be exposed upwards, when the elastic buckle part 11 is buckled, it is easier to judge the assembly exception in the assembly process, so as to timely eliminate the assembly risk. In addition, the conductor sheet fixing structure 100 has assembly convenience, which means higher assembly efficiency and more advantageous economic cost.

[0061] The above disclosure is only a preferred embodiment of the utility model, and cannot limit the scope of the utility model, therefore, equivalent changes made according to the utility model claims all belong to the scope covered by the utility model.

Claims

1. A conductor sheet fixing structure, characterized in that, include: The conductor sheet body has several elastic snap-fit ​​parts protruding from it; A guide plate is provided with a plurality of holes corresponding one-to-one with the elastic buckle parts, and each elastic buckle part is inserted into the respective hole and fastened to the guide plate.

2. The conductor sheet fixing structure according to claim 1, characterized in that, The elastic buckle includes a first elastic buckle body and a second elastic buckle body. The first elastic buckle body and the second elastic buckle body are respectively disposed on the conductor sheet body. The first elastic buckle body and the second elastic buckle body simultaneously pass through the buckle hole and fasten to the conductive plate.

3. The conductor sheet fixing structure according to claim 2, characterized in that, The conductor sheet body has a first opening at the position corresponding to the first elastic buckle body, and the conductor sheet body has a second opening at the position corresponding to the second elastic buckle body. One end of the first elastic buckle body is integrally connected to one of the inner sidewalls of the first opening, and the other end of the first elastic buckle body is bent and extends out of the first opening. One end of the second elastic buckle body is integrally connected to one of the inner sidewalls of the second opening, and the other end of the second elastic buckle body is bent and extends out of the second opening.

4. The conductor sheet fixing structure according to claim 2, characterized in that, The first elastic buckle body and the second elastic buckle body are symmetrically distributed on the conductor sheet body.

5. The conductor sheet fixing structure according to claim 1, characterized in that, The card hole has a long slit-like structure, and the elastic buckle part has a sheet-like structure. The elastic buckle part is tightly inserted into the card hole.

6. The conductor sheet fixing structure according to claim 1, characterized in that, It also includes a PCBA component, which is connected to the conductive plate and located on one side of the conductive plate. The conductor sheet body is located on the other side of the conductive plate. The conductor sheet body is provided with a first lug, which passes through the conductive plate and is inserted into the PCBA component.

7. The conductor sheet fixing structure according to claim 6, characterized in that, It also includes solderless terminals, wherein the PCBA component is provided with a socket, and the pins of the solderless terminals are inserted into the socket.

8. The conductor sheet fixing structure according to claim 7, characterized in that, The solderless terminal is located above the PCBA component, and the pins of the solderless terminal extend downward and are inserted into the socket.

9. A PTC water heater, characterized in that, The device includes a lower shell, a heating mounting base, heating modules, and a conductor sheet fixing structure as described in any one of claims 1-6. The lower shell has a cavity, the heating mounting base is mounted on the lower shell and closes the cavity, a plurality of heating modules are mounted in the heating mounting base, the conductive plate is mounted above the heating mounting base, and the heating modules are connected to the conductor sheet body.

10. The PTC water heater according to claim 9, characterized in that, The heating module has a second lug, and the conductor sheet body has a plurality of elastic claw portions protruding therefrom, and the second lug is inserted into the elastic claw portions.

11. The PTC water heater according to claim 10, characterized in that, The elastic claw portion includes at least two elastic claw bodies, and there is an insertion gap between each elastic claw body. The second lug is inserted into the insertion gap.

12. The PTC water heater according to claim 11, characterized in that, The conductive plate is provided with a plurality of through holes corresponding one-to-one with the elastic claw portion, and the second lug passes through the insertion gap and is inserted into the through hole.

13. The PTC water heater according to claim 11, characterized in that, The conductor sheet body has a third opening at the position corresponding to the elastic claw body. One end of each elastic claw body is integrally connected to the two opposite inner sidewalls of the third opening, and the other end of each elastic claw body is bent and extends out of the third opening.

14. The PTC water heater according to claim 10, characterized in that, The heating module includes a U-shaped clamp, a PI composite film, a PTC bracket, a PTC sheet, and an electrode sheet. The PI composite film is disposed within the U-shaped clamp, the PTC bracket is disposed within the PI composite film, and the PTC bracket has a receiving cavity. Several PTC sheets are respectively disposed within the receiving cavity, and the electrode sheet is disposed within the PI composite film. The electrode sheet is connected to the PTC bracket and covers the receiving cavity. Two second lugs are respectively protruding from the PTC bracket and the electrode sheet.

15. The PTC water heater according to claim 14, characterized in that, The heating mounting base is provided with several mounting slots, and each heating module is respectively set in each mounting slot. The U-shaped clamp has an elastic structure and the U-shaped clamp elastically abuts against the inner wall of the mounting slot.

16. The PTC water heater according to claim 14, characterized in that, The electrode sheet is conical, and the electrode sheet is connected to the PTC support to form a conical structure.

17. The PTC water heater according to claim 10, characterized in that, The heating module includes a PTC bracket, a first ceramic substrate, a first electrode sheet, a PTC sheet, a second electrode sheet, and a second ceramic substrate arranged sequentially in the same direction. The PTC bracket has a receiving cavity, and the PTC bracket, the first ceramic substrate, the first electrode sheet, the PTC sheet, and the second electrode sheet are located in the receiving cavity. The second ceramic substrate is connected to the PTC bracket and covers the second electrode sheet. Two second lugs are respectively protruding from the first electrode sheet and the second electrode sheet.

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