JPH028359Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to small electric devices such as electric shavers and electric toys that use batteries as a power source. This is to ensure the reliability of the connection.

[Conventional technology]

Conventionally, in battery-operated small electric devices, when a rib is integrally molded on the inner surface of the main body case to position and hold the battery to prevent it from rattling, the molding cost is high. As shown in FIG. 5, there is one in which the inner diameter of the battery housing chamber 4 is matched to the outer diameter of the battery 12, and the housing chamber 4 is simply formed into a cylindrical shape without ribs. In addition, the cathode of the battery 12 and the terminal 1 of the motor 6
If 5 and 5 are soldered using lead wires, assembly is complicated. Moreover, since this also increases the cost, the free upper end 13b of the cathode lead plate 13 made of a plate spring of the battery 12 is simply brought into elastic contact with the terminal 15 of the motor 6 by utilizing this elasticity, as shown in FIG. There is something.

[Problem that the invention attempts to solve]

However, in the conventional device described above, the battery storage chamber 4
If it is formed to the full outer diameter of the battery 12, it will be difficult to take it in and out, and if it is formed larger than the outer diameter of the battery 12, the battery 12 will shake, so the inner diameter dimension of the battery storage chamber 4 must be strictly controlled. It's hot and bothersome. In addition, simply the cathode lead plate 1
Simply bringing the terminal 3 into elastic contact with the motor terminal 15 lacks the strength to maintain the connection, and is likely to cause poor contact due to vibration or the like.

[Means for solving problems]

In order to solve the above problems, in this invention,
As shown in FIG. 1, the battery housing chamber 4 of the main body case 1
The cathode lead plate 13 made of a leaf spring disposed inside is entirely bent into an arc shape protruding toward the surface that contacts the battery 12, and has a free upper end portion that comes into elastic contact with the motor terminal 15 of the cathode lead plate 13. The concave curved surface side opposite to the convex curved surface of 13b is received and supported on a support projection 18 protruding from the inner surface of the main body case 1.

[Effect]

In such a case, by pressing the convex curved side of the cathode lead plate 13 with the battery 12, the battery 12 is strongly pressed against one side of the inner surface of the main body case 1 and is housed and held without wobbling, and at the same time, Due to the lever principle, the free upper end 13b of the cathode lead plate 13 above the support protrusion 18 moves inward of the case, opposite to the pressing direction, using the support protrusion 18 as a fulcrum, and the terminal of the motor 6 disposed in that direction is moved. 15, resulting in a strong elastic contact action.

〔Example〕

An embodiment of this invention will be described below based on the drawings. Figures 1 to 4 illustrate a battery-powered electric shaver, in which a main body case 1 is formed into a cylindrical shape and has a partition wall 2 that partitions the interior into upper and lower parts. A motor housing chamber 3 and a battery housing chamber 4 are formed in the lower part, respectively. The upper part of the motor storage chamber 3 is closed with a hair tray 5, and the shaft 7 of the motor 6 projects upward from the central opening of the hair tray 5 to freely rotate the holder 9 of the inner cutter 8 housed in the hair tray 5. To support. Inner cutter 8 is mesh outer cutter 1
0, and the holder 11 of the outer cutter 10 is screwed into the hair receiving tray 5. The motor 6 drives the inner cutter 8 by using the battery 12 housed in the battery storage chamber 4 through the openable bottom opening as a power source.
Rotate and slide against the inner surface of the The hair receiving tray 5 has a pair of ribs 21, 21 provided at the lower part of the hair receiving tray 5, which are aligned and fitted into vertical grooves 23, 24 provided on the inner surface of the motor housing chamber 3, and a pair of ribs 21, 21 provided at the lower part of the hair receiving tray 5 are aligned and fitted into vertical grooves 23, 24 provided on the inner surface of the motor housing chamber 3. A pair of elastically deformable engaging claws 25, 25 provided on the motor accommodation chamber 3 utilize this elasticity to slide into contact with the claw receiving pieces 26, 26 protruding from the inner surface of the motor housing chamber 3, and then engage the lower surface side thereof. By elastic engagement, it is assembled and fixed at a fixed position inside the motor housing chamber 3 from above. Terminal 1 of motor 6 (described later)
The upper end of 9 is a recess 27 provided in the lower part of the hair receiving tray 5.
It is fixed in the plug.

In this structure, this invention is characterized by the shape of the cathode lead plate 13 of the battery 12 and the support structure of the free upper end 13b of this cathode lead plate 13.

The cathode lead plate 13 is entirely formed of a band-shaped leaf spring material and is bent into an arc shape that protrudes toward the side that contacts the battery 12 (see the state indicated by the imaginary line F in FIG. 1), and is attached to the main body case. The lower end portion 13a is arranged vertically along the inner surface of the battery storage chamber 4 of 1.
is fixed on the bottom opening edge of the main body case 1, and a conical coil spring 16 is attached to this fixed lower end 13a.
Attach. The conical coil spring 16 is received and supported by the battery cover 17, contacts the cathode of the battery 12, and presses the battery 12 upward. The free upper end portion 13b of the cathode lead plate 13 receives and supports this concave curved surface side on a support protrusion 18 protruding into a hole 14 formed in a part of the partition wall 2, and the free upper end portion 13b of the cathode lead plate 13 receives and supports the concave curved surface side on a support protrusion 18 protruding from a hole 14 formed in a part of the partition wall 2. The curved surface side is brought into elastic contact with the terminal 15 of the motor 6. Note that the other terminal 1 of the motor 6
9 is connected to the anode of the battery 12 via a switch 20.

In such a case, when the battery 12 is housed in the main body case 1, the battery 12 is inserted into the cathode lead plate 13.
It comes into elastic contact with the convex curved surface between the fixed lower end 13a and the free upper end 13b, and receives the elastic restoring force and is strongly pressed against one side of the inner surface of the main body case 1, so that it does not shake. Further, as the cathode lead plate 13 is elastically deformed due to contact with the battery 12, the convex curved surface side above the support protrusion 18 of the cathode lead plate 13 is bent back toward the motor terminal 15 using the support protrusion 18 as a fulcrum. Because of the elastic deformation, the state of elastic contact with the terminal 15 becomes more reliable.

[Effect of idea]

As explained above, according to the electric shaver and other battery-powered small electric appliances of the present invention, the cathode lead plate 13 made of a leaf spring is bent into an arc shape that protrudes in its entirety toward the surface that comes into contact with the battery 12, and Support protrusion 1 supports free upper end 13b of cathode lead plate 13.
8, it was accepted and supported. Therefore, the battery 12 can be prevented from wobbling by the simple means of utilizing the springiness of the cathode lead plate 13, and the free upper end 13b of the cathode lead plate 13 above the support protrusion 18 can be prevented from shaking. Support protrusion 1
8 as a fulcrum, moving in the direction of the terminal 15 of the motor 6 and coming into strong, stable and reliable elastic contact with the terminal 15, thereby achieving a good contact state.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of an electric shaver which is an example of a small battery-powered electrical device according to this invention, Fig. 2 is a cross-sectional view taken along the line - - in Fig. 1, Fig. 3 is an exploded perspective view, and Fig. 4 is a cross-sectional view taken along the - line in Fig. 1. FIG. 1 is a sectional view taken along the - line in FIG. FIG. 5 is a longitudinal sectional view of a conventional electric shaver. DESCRIPTION OF SYMBOLS 1...Main body case, 6...Motor, 12...Battery, 13...Cathode lead plate, 13a...Lower end of cathode lead plate, 13b...Free upper end of cathode lead plate, 15...Motor terminal , 18...Support protrusion.

Claims (1)

[Claims for Utility Model Registration] A battery 12 is housed in a cylindrical main body case 1 so that it can be taken in and out from the openable/closed bottom opening, and a cathode lead plate 13 made of a leaf spring is attached to the main body case 1.
The fixed lower end 13a of the cathode lead plate 13 is fixed to the bottom opening side of the main body case 1 and is connected to the cathode of the battery 12, and the free upper end 13b of the cathode lead plate 13 is arranged vertically along the inner surface of the main body. In a small battery-powered electrical device that comes into elastic contact with the terminal 15 of the motor 6 built into the case 1 above the battery 12, the entire cathode lead plate 13 protrudes toward the surface that comes into contact with the battery 12. As well as being bent into an arc,
The concave curved surface side of this free upper end portion 13b is the main body case 1.
The battery 12 presses the convex curved surface between the fixed lower end 13a and the free upper end 13b of the cathode lead plate 13. At the same time, due to the pressing force, the convex curved surface side above the support protrusion 18 of the free upper end portion 13b moves inward of the case, opposite to the pressing direction, using the support protrusion 18 as a fulcrum, and the motor disposed in that direction moves. 6 terminal 1
5. A small battery-powered electrical device characterized by being in elastic contact with a battery.