JPS623102Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for easily attaching a hinge to an outer cutter frame of an electric shaver.

Conventionally, as shown in FIGS. 7 to 9, a hinge 52' is assembled by passing a pivot 53' through a hinge plate 50' and a spring 54'.
The hinge 52' is inserted into the fitting groove 49' formed in the inner surface of the outer cutter frame 3', and the edges inside the fitting groove 49' are caulked as shown in FIG. 9 to attach the hinge 52' to the outer cutter frame. It was rotatably attached to one side of 3'. Furthermore, the 9th
The broken line in the figure shows the fitting groove 49' before caulking. Therefore, a caulking process is required, which makes assembly difficult, and the material of the outer cutter frame 3' is limited to materials that can be caulked and ensure caulking strength (for example, metal materials such as zinc die-casting). There were flaws.

The present invention was made in view of the drawbacks of the conventional examples mentioned above, and its purpose is to easily attach the hinge to the outer cutter frame and to create an electric shaver with fewer restrictions on the material of the outer cutter frame. Provides a structure for attaching the hinge to the outer blade.

Hereinafter, the present invention will be explained in detail with reference to the accompanying drawings. The electric shaver of the present invention shown in FIGS. 1 and 2 is waterproof and rechargeable. This electric shaver consists of a main body housing 1, a blade mount 4 attached to the upper opening of the main body with an O-ring 17 interposed therebetween, an outer cutter frame 3 supporting an outer cutter 9, etc., and a motor. 6 and the battery 7 are connected to the lever 26, the printed circuit board 23, the switch spring 29, and the contact lug 3.
0, the terminal portion is attached to the base 2 together with the waterproof rubber 24 and housed in the main body housing 1. 5 in the diagram
is a driver whose reciprocating motion is caused by the rotation of an eccentric shaft 51 attached to the output shaft of a motor 6, and its upper part is inserted through a central hole of the blade mount 4 with a waterproof rubber 18 interposed between the driver and the edge of the hole. so that it protrudes from the top surface of the blade mount 4,
The inner cutter block 8 is connected. A trimmer block 10, which is pivotally mounted on one side of the blade mount 4, is connected to the upper part of a trimmer handle 11, which is arranged on one side of the main body housing 1 so as to be able to move up and down, and is raised and driven by the upward movement of the trimmer handle 11. Connected to child 5. 20 is a conical cylinder-shaped driver element waterproof rubber 18
a presser plate for pressing the outer peripheral edge of the blade onto the upper surface of the blade mounting base 4;
9 is O for waterproofing the insertion part of the mounting screw of the holding plate 20.
It's a ring. The outer cutter frame 3 is pivotally supported on the blade mount 4 by inserting a hinge 52 rotatably attached to one end of its inner surface into a fixed spring 55 disposed inside one end of the blade mount 4. It is biased in the opening direction by a spring 54, and the other end of the inner surface is latched to a hook portion of an operation button 57 arranged at the other end of the mounting base 4. 56 is a return spring for the operation button 57. The terminal waterproof rubber 24 is for waterproofing the bottom of the main body housing 1, and is provided with an insertion portion for a pair of charging terminals 25 that protrudes into a recess in the bottom of the main body housing 1, and has a base end of the terminal 25. It is arranged and fixed between the printed circuit board 23 soldered to the inner bottom surface of the main body housing 1.
The anode metal fitting (not shown) of the battery 7 is connected to the switch spring 2.
9 and attached to the cathode of the battery 7
4 is connected to one pole of the motor 6. The other end of the contact lug 30 that contacts the other pole of the motor 6 is located behind the switch handle 12 via a waterproof rubber 16 together with the switch spring 29, and when the switch handle 12 moves upward, the switch spring 29 bends. It contacts the contact lug 30 and energizes the motor 6.

Now, as shown in FIG.
It consists of a spring 54 bent in a letter shape, and a pivot 5 is attached to the upper end of the hinge plate 50 and the lower end of the spring 54.
It is composed of 3. Here spring 5
4, as shown in FIG. 5, the center part of the coil spring part 54a is made to protrude upward in an inverted U-shape to form an inverted U-shaped part 5.
4b, and a stop portion 42 is configured to protrude from the end of the coil spring portion 54a. The pivot 53 is inserted into the coil spring portion 54a and rotatably attached to a bearing portion 50a provided on the hinge plate 50. As a result, the upper end of the spring 54 forms a bent locking portion 48 . On the other hand, as shown in FIG.
A recess 47 that also opens downward is provided on the inner surface of one end (the end surface in the moving direction of the inner cutter), and bearing grooves 46 are cut into both sides of the recess 47 on the lower surface of the outer cutter frame 3, respectively. ing. Further, a protrusion 45 is projected from the center of the recess 47, and the upper surface of the protrusion 45 becomes a locked part 44 on which the locking part 48 of the spring 54 can be hooked, and the lower part is an inclined guide surface. 43. Therefore, in order to attach the hinge 52 to the outer cutter frame 3, as shown in FIG. As the spring 54 is delivered to the inner cutter, the inclined guide surface 43 bends the spring 54 toward the inner cutter, and at the same time the pivot 53 fits into the bearing groove 46, the locking portion 48 at the upper end of the spring 54 is locked. Once it is hooked onto the portion 44, it is prevented from coming off, and the hinge 52 is fixed. Reference numeral 42 designates a stop portion at the lower end of the spring 54, and the stop portion 42 is hooked on the hinge plate 50 to urge the hinge 52 in the opening direction of the outer cutter frame 3 (that is, the hinge 52 is a stop portion at the upper end of the spring 54). The portion 48 is elastically biased toward the inner surface of the outer cutter frame 3 and biases the hinge 52 in the opening direction of the outer cutter frame 3). Note that the hinge plate 50 is designed to rotate at an angle of 90 degrees or more.

As described above, the present invention comprises a spring by providing an upwardly projecting inverted U-shaped part in the center of the coil spring part and a stop part protruding from the end of the coil spring part. The pivot inserted into the outer cutter frame is rotatably attached to the bearing provided on the hinge plate, the stopper is hooked to the hinge plate to form a hinge, and the pivot is inserted into the downwardly opening bearing groove provided at the lower end of the outer cutter frame. At the same time, the inverted U-shaped part of the spring is locked to a protrusion protruding from the inner surface of the outer cutter frame. The pivot can be prevented from coming off by simply locking onto the protrusion protruding from the inner surface of the blade frame, and the hinge can be easily installed without the need to swage the outer blade frame. It has the advantage that there are no restrictions on materials. Furthermore, since the spring is provided with an inverted U-shaped part and the inverted U-shaped part is locked to the protrusion, even if a tensile force is applied to the spring, the upper end of the inverted U-shaped part of the spring will deform and the outer cutter will be damaged. It has the effect of not coming off from the protrusion of the frame.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a partially cutaway front view of the same as above, Figure 3a,
b is a partially broken front view and sectional view of the same outer cutter frame as above, Fig. 4 is a perspective view of the hinge attachment part, Fig. 5
The figure is an exploded perspective view of Figure 4, Figures 6a, b, and c are operation diagrams of the same hinge when installed, Figures 7 and 8 are a partially broken front view and sectional view of the conventional example, FIG. 9 is a cross-sectional view of FIG. 1... Main body housing, 3... Outer blade frame,
9...Outer blade, 42...Stopping portion, 46...Bearing groove,
50... Hinge plate, 50a... Bearing part, 5
2...Hinge, 53...Pivot, 54...Spring, 54a...Coil spring portion, 54b...Inverted U-shaped portion.

Claims (1)

[Scope of utility model registration request] In an electric shaver in which the lower end of one side of the outer cutter frame that holds the outer cutter is rotatably hinged to a hinge plate attached to the main housing, the outer cutter frame can be opened and closed. A spring is constructed by providing an inverted U-shaped part projecting upward and a stop part protruding from the end of the coil spring part, and a bearing part in which a pivot shaft inserted into the coil spring part of the spring is provided on a hinge plate. Attach the spring so that it can rotate freely, hook the stopper to the hinge plate to form a hinge, fit the pivot into the downward-opening bearing groove provided at the lower end of the outer blade frame, and remove the inverted U-shaped part of the spring. An electric shaver that is secured to a protrusion protruding from the inner surface of the blade frame.