Water pump circuit board and cable holder structure

Abstract

To provide a structure consisting of a water pump circuit board and a cable holder.SOLUTION: A structure consisting of a water pump circuit board and cable holder is located in a housing of the water pump and has a circuit board and cable holder. The circuit board has an installation site located on one side edge and two positioning holes at a predetermined distance from the installation site. The cable holder has two outward extending arms. Each arm has a columnar positioning section extending upward. One or more of the tips of the columnar positioning sections of the cable holder and the two arms have a holding edge. The two columnar locating sections penetrate the two positioning holes in the circuit board. The two arms are located below the circuit board. The holding edge is located above the circuit board and holds the circuit board.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a water pump, and more particularly to a structure of a water pump comprising a circuit board and a cable holder. [Background technology]

[0002] In a conventional drainage pump, Patent Document 1 discloses a pump and a manufacturing method thereof. In Patent Document 1, a spacer is placed on the lower mold. A stator and a control member are placed on the spacer. A housing is injection molded into the mold. Due to the above-mentioned structural features, the stator and the control member are covered by the housing.

[0003] Patent document 1 discloses a technical concept of injection molding a housing to cover the stator and control members. However, in reality, the pressure and extrusion force generated when injecting liquid plastic material into a mold during the injection molding process can cause the cable holder that connects the cable to move from its designated position on the circuit board and deviate from the circuit board, reducing the percentage of non-defective products.

[0004] Therefore, an object of the present invention is to solve the problem of a decrease in the rate of non-defective products in the subsequent injection molding process due to the inability to fix the cable holder to the circuit board in advance. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Publication number CN100491739C Summary of the Invention [Problem to be solved by the invention]

[0006] The main object of the present invention is to provide a water pump structure consisting of a circuit board and a cable holder. In the water pump structure consisting of a circuit board and a cable holder according to the present invention, the cable holder is reliably fixed to the circuit board, so that the cable holder does not come off the circuit board even when it is subjected to pressure and extrusion force during the injection molding process, thereby eliminating the occurrence of defective products. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, a structure consisting of a circuit board and a cable holder for a water pump is disposed in a housing of the water pump, and includes a circuit board and a cable holder. The circuit board has an installation portion located on one edge portion, two positioning holes at a predetermined distance from the installation portion, and an insertion portion located between each of the positioning holes and the installation portion. The cable holder has two arms extending outward. Each arm has a columnar positioning portion extending upward and an insertion space formed between the columnar positioning portion and the cable holder. One or more of the tips of the columnar positioning portions of the cable holder and the two arms have a pressing edge portion. The two columnar positioning portions pass through the two positioning holes of the circuit board. The two arms are located below the circuit board. The two insertion portions of the circuit board are inserted into the two insertion spaces of the cable holder. The pressing edge portion is located above the circuit board and presses the circuit board.

[0008] In particular, in the present invention, the cable holder is securely fixed to the circuit board, so that it will not come off from the circuit board during the injection molding process of the housing. The above-mentioned structural features can ensure the quality of the product and eliminate the occurrence of defective products. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a water pump in which a structure consisting of a circuit board and a cable holder of a water pump according to a first embodiment of the present invention is formed. [Diagram 2] 1 is a plan view showing a structure of a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. FIG. [Diagram 3] 1 is an exploded plan view showing a structure including a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. FIG. [Figure 4] 1 is a perspective view showing a cable holder in a structure including a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. FIG. [Diagram 5] 1 is a perspective view showing a state in which a cable passes through a cable holder in a structure including a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. FIG. [Figure 6] FIG. 3 is a cross-sectional view taken along line 6-6 in FIG. [Figure 7] 1 is a cross-sectional view showing a state in which a spacer and a stator are combined in a structure consisting of a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. FIG. [Figure 8] 1 is a cross-sectional view showing a mold including a structure consisting of a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. [Figure 9] 1 is a cross-sectional view showing a housing molded into a structure including a circuit board and a cable holder of a water pump according to a first embodiment of the present invention. FIG. [Figure 10] FIG. 11 is a cross-sectional view showing a structure of a circuit board and a cable holder of a water pump according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a structure of a water pump according to the present invention, which is composed of a circuit board and a cable holder, will be described with reference to the drawings.

[0011] (First embodiment) As shown in FIGS. 1 to 6, a water pump circuit board and cable holder structure 10 according to a first embodiment of the present invention is disposed within a housing 92 of a water pump 91 and comprises a circuit board 11 and a cable holder 21.

[0012] The circuit board 11 has an installation site 12 located on one edge portion, two positioning holes 14 spaced a predetermined distance from the installation site 12, and insertion portions 16 located between each of the positioning holes 14 and the installation site 12.

[0013] The cable holder 21 has two arms 22 extending outward. Each arm 22 has a columnar positioning portion 221 formed by protruding upward from an end portion, and an insertion space 23 located between the columnar positioning portion 221 and the cable holder 21. The cable holder 21 further has a pressing edge portion 24. In the first embodiment, the pressing edge portion 24 is formed by extending upward and laterally from the cable holder 21.

[0014] The two columnar positioning portions 221 pass through the two positioning holes 14 of the circuit board 11. The two arms 22 are positioned below the circuit board 11. The two insertion portions 16 of the circuit board 11 are inserted into the two insertion spaces 23 of the cable holder 21. The pressing edge portion 24 is positioned above the circuit board 11 and presses the circuit board 11.

[0015] In the first embodiment, the cable holder 21 has a fitting groove 26 formed to be recessed outward. The circuit board 11 has a fitting portion 121 formed to protrude outward from the installation portion 12. The fitting portion 121 fits into the fitting groove 26. The cable holder 21 has a plurality of through holes 28. A plurality of cables 31 are disposed between the two arms 22, and each pass through the through holes 28. After the housing 92 is molded in the injection molding step, a portion of the cable holder 21 is exposed to the housing 92, and another portion is covered by the housing 92. The circuit board 11 is located within the housing 92.

[0016] The above is a description of the structure of the first embodiment. Next, a description will be given of the state in which the injection molding process proceeds in the first embodiment.

[0017] As shown in Figures 2 and 6, the cable holder 21 and the circuit board 11 are first joined together, the circuit board 11 is pressed down with the pressing edge 24, and the two columnar positioning portions 221 are inserted into the two positioning holes 14, whereby a clamping and positioning relationship is established, i.e., the cable holder 21 is fixed onto the circuit board 11.

[0018] Next, as shown in Fig. 7, the combined circuit board 11 and cable holder 21 are placed on the stator 94 and spacer 96. As shown in Fig. 8, they are transferred together into a mold 100. When the housing 92 is injection molded in the mold 100 as shown in Fig. 9, the housing 92 is molded so as to cover the stator 94, the spacer 94, the circuit board 11, and a portion of the cable holder 21. A portion of the cable holder 21 is exposed to the housing 92.

[0019] In the first embodiment, the cable holder 21 is securely fixed to the circuit board 11, and therefore does not come off from the circuit board 11 during the injection molding process. The above-mentioned structural features ensure product quality and eliminate the occurrence of defective products.

[0020] Second embodiment 10 is a cross-sectional view showing a water pump circuit board and cable holder structure 10' according to a second embodiment of the present invention. The differences from the first embodiment are as follows.

[0021] In the second embodiment, the pressing edge 24' is formed from the end portions of the two columnar positioning parts 221' of the cable holder 21'. The second embodiment adopts two plastic columnar positioning parts 221' or the entire cable holder 21' and two columnar positioning parts 221' made of plastic. After the two columnar positioning parts 221' penetrate the two positioning holes 14' of the circuit board 11', the end portions of the two columnar positioning parts 221' are melted by heat and deformed into a hemispherical shape, and the two pressing edges 24' are formed separately at the end portions of the two columnar positioning parts 221' to press the circuit board 11'.

[0022] Other structures and effects achieved by the second embodiment are the same as those of the first embodiment, so detailed description thereof will be omitted.

[0023] To summarise the above, in contrast to the first embodiment in which the pressing edge 24 is formed on the cable holder 21, the second embodiment forms two pressing edges 24' on two columnar positioning portions 221' of the cable holder 21'. In other words, it can be understood with reference to the first and second embodiments that by arranging pressing edges on the cable holder and the two columnar positioning portions, the effect of pressing the circuit board can be increased and the cable holder can be fixed and stably attached to the circuit board.

[0024] As described above, the present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit of the invention. [Explanation of symbols]

[0025] 10, 10' Water pump circuit board and cable holder structure 11, 11' Circuit Board 12 Installation location 121 Fitting part 14, 14' Positioning holes 16 Insertion part 21, 21' Cable holder 22 Arm 221, 221' column-shaped positioning part 23 Insertion space 24, 24' Pressing edge 26 Fitting groove 28 Through hole 31 Cable 91 Water Pump 92 Housing 94 Stator 96 Spacer 100 Molds

Claims

1. The water pump housing includes a circuit board and a cable holder. The circuit board has an installation portion located on one edge portion, two positioning holes at a predetermined distance from the installation portion, and an insertion portion located between each of the positioning holes and the installation portion, the cable holder has two outwardly extending arms, each of the arms having an upwardly extending post-like locating portion and an upwardly extending insertion space located between the post-like locating portion and the cable holder; At least one of the cable holder and the tip ends of the columnar positioning portions of the two arms has a pressing edge portion, the two columnar positioning portions pass through the two positioning holes from the lower side to the upper side of the circuit board, and the two arms are located below the circuit board; The two plug-in portions of the circuit board are inserted into the two plug-in spaces of the cable holder, The pressing edge is disposed above the circuit board, the arm and the pressing edge portion press both upper and lower surfaces of the mounting portion of the circuit board, This structure consists of the water pump circuit board and cable holder.

2. The cable holder has a fitting groove formed to be recessed on the outside, 2. The structure of claim 1, wherein the circuit board has a fitting portion formed to protrude outward from the installation portion, and the fitting portion is fitted into the fitting groove.

3. The cable holder has a plurality of through holes, 2. The circuit board and cable holder structure for a water pump according to claim 1, wherein a plurality of cables are disposed between the two arms and pass through the through holes, respectively.

4. 2. The structure of claim 1, wherein the pressing edge is formed by spreading upward and laterally from the cable holder.

5. The structure consisting of a circuit board and a cable holder for a water pump as described in claim 1, characterized in that each of the columnar positioning portions is made of plastic and has a pressing edge portion at its tip, and the pressing edge portion is molded by melting and deforming the tip portion of the columnar positioning portion.

6. a portion of the cable holder is exposed to the housing and another portion is covered by the housing; 2. The circuit board and cable holder structure of a water pump as claimed in claim 1, wherein the circuit board is mounted within the housing.

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