JPH07288120A - Battery power source device of cylindrical electrical machinery and appliance - Google Patents

Abstract

PURPOSE:To make attaching/detaching operation easy, simplify structure for easy production, and reduce cost. CONSTITUTION:A battery case 5 is attachably/detachably fixed to a cylindrical main body case 1 in which an electrical machinery and appliance is accommodated. Hill-shaped projection 1a and recess 5a for positioning, capable of deforming in the direction of thickness, are fittingly installed on edge surface of both cases. For fitting, a locking recess 1b formed in either one of the projection 1a and the recess 5a and a locking projection 5d formed in the other are engaged. When both cases are turned in the direction opposite to each other, the projection 1a and the recess 5a slide on an inclined surface to separate both cases in the axial direction and engagement of the locking recess lb and the locking projection 5d is released, and both cases are separated in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery power supply device for cylindrical electric equipment.

[0002]

2. Description of the Related Art In a battery power supply device of this type that has been conventionally used, after accommodating a battery in a main body case of a tubular electric device, a tubular battery lid is screwed onto the main body case,
A battery is housed by providing a claw and a recess that can be locked to each other and pushing the lid toward the main body case to engage the claw and the recess.

[0003]

With the above-mentioned screw type, the structure of both the main body case and the battery lid is complicated, and the labor for screwing is troublesome.
Also, in the case of the engagement type, it is necessary to pull it with a large force when removing it, so that the nail may be damaged, and for electric equipment that requires waterproofness, tight and strong engagement can be obtained. It must be constructed, requires precision in manufacturing and is more difficult to remove. Therefore, an object of the present invention is to facilitate the attachment / detachment operation, simplify the structure, facilitate the manufacturing, and achieve cost reduction.

[0004]

In order to achieve the above object, a battery power supply device for a tubular electric device according to the present invention includes a tubular main body case for accommodating the electric device, and a detachable attachment to the main body case. And a cylindrical battery case.
Then, one of the abutting end faces of the main body case and the battery case is provided with a ridge-shaped projection for positioning which is deformable in the thickness direction, and the other is provided with a recess fitted to the projection. Further, one of the protrusion and the recess is provided with a locking projection, and the other is provided with a locking recess engageable with the locking projection. The locking convex portion and the locking concave portion are engaged with each other at a position where the protrusion fits into the recess, and when the main body case and the battery case rotate relatively in opposite directions, To allow the battery case to be axially separable from the main body case by sliding the recess and the recess on the inclined surface to release the engagement between the locking projection and the locking recess. Is characterized by.

[0005]

[Function] The mounting of the main body case and the battery case is performed by fitting the chevron-shaped projection and the recess, and at this position,
The locking recess is engaged with the locking projection. When the main body case and the battery case are rotated in relatively opposite directions, the protrusion and the recess slide on the inclined surface, and at the same time, the protrusion is deformed in the thickness direction to form the locking protrusion and the locking recess. Is disengaged and both cases are separated from each other in the axial direction. Since the positioning projection can be elastically deformed in the thickness direction, it can be easily attached and detached as compared with the projection that cannot be deformed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an example in which the present invention is applied to an electric toothbrush. As shown in FIG. 1, a cylindrical body case 1
Is provided with a switch 2 for switching on and off. A cover 3 and a toothbrush 4 are detachably provided at one end (upper end) of the main body case 1. A battery case 5 is detachably attached to the other end (lower end) of the main body case 1. As shown in FIGS. 2 and 3, the battery case 5 has a cylindrical portion 5b whose outer peripheral surface is flush with the outer peripheral surface of the main body case 1, and a step inward from the outer peripheral surface of the cylindrical portion 5b. However, the cylindrical portion 5c formed so as to be fitted to the inner surface of the main body case 1 is integrally formed. A packing receiver is provided in the middle of the tubular portion 5c, and a waterproof packing 6 is fixed thereto. The upper end surface of the tubular portion 5b of the battery case 5 is abutted against the lower end surface of the main body case 1, and a tongue-shaped positioning chevron shape that is deformable in the thickness direction is formed on a part of the abutted end surface on the main body case 1 side. Projection 1
a is formed, and a ridge-shaped concave portion 5a for positioning that fits into the protrusion 1a is formed on the abutting end surface on the battery case 5 side. A locking projection 5d is provided in the recess 5a. The projection 1a is provided with a locking recess 1b.
The locking projection 5d and the locking recess 1b are engaged with each other at a position where the projection 1a and the recess 5a are fitted together.

Since the protrusion 1a is formed so as to be elastically deformable in the thickness direction, when the battery case 5 is rotated to the right with respect to the main body case 1, for example, the inclined surface of the protrusion 1a becomes the recess 5a. When the battery case 5 begins to move in the axial direction away from the main body case 1 by sliding on the inclined surface, it is possible for the protrusion 1a to bend and get over the locking protrusion 5d. Therefore, the engagement between the engagement projection 5d and the engagement recess 1b can be canceled while the battery case 5 is axially separated from the body case 1. Further, since the tubular portion 5c is fitted to the inner surface of the main body case 1, it is possible to easily insert the waterproof packing 6 therebetween, as necessary, to improve the waterproofness of the electric device. It is valid.

Further, as shown in FIG. 4, a main body case 1 accommodates a middle cylinder 7 for holding drive equipment, which will be described later, and a drive motor 8 is provided at the center of the middle cylinder 7. The pinion 9 is press-fitted into the motor shaft. A gear 10 meshes with the pinion 9 and transmits the rotation of the motor 8 to the gear 11. An eccentric cam portion 12 is integrally provided on the back side of the gear 11 to move the output shaft drive portion 13 forward and backward with a minute stroke. One end of the output shaft 14 is press-fitted into the tip of the output shaft drive unit 13, and the movement of the output shaft drive unit 13 is transmitted to the toothbrush 4 press-fitted into the other end of the output shaft 14. A waterproof rubber cap 15 for waterproofing is provided on the upper ends of the main body case 1 and the middle cylinder 7, and the output shaft 14 penetrates the center of the waterproof rubber cap 15. A battery holder 16 is provided at the lower end of the middle cylinder 7, and a battery 17 is stored therein.

With such a structure, when the battery 17 is housed and the projection 1a of the main body case 1 is fitted and positioned in the recess 5a of the battery case 5, the locking projection 5 is formed.
The battery case 5 is prevented from coming off the main body case 1 by engaging d with the locking recess 1b. Therefore, when the battery case 5 is rotated to the right with respect to the main body case 1, for example, the inclined surface of the protrusion 1a slides on the inclined surface of the recess 5a, and the battery case 5 is separated from the main body case 1 in the axial direction. Start moving in the direction you want to. At this time, the protruding portion 1a bends over the locking convex portion 5d, and the locking convex portion 5d and the locking concave portion 1b are disengaged. Therefore, when the battery case 5 is pulled in the axially separating direction from the main body case 1, there is no engaging portion in the inside at this time, so that the battery case 5 can be smoothly detached from the main body case 1. When connecting the battery case 5 to the main body case 1 after storing the battery 17,
With the protrusion 1a facing the recess 5a, the battery case 5
It suffices to insert straight into the body case 1.

The fitting of the protrusion 1a and the recess 5a is not limited to one place, but a plurality of places can be used as long as the main body case 1 and the battery case 5 are positioned at a relatively constant position. It may be. The locking convex portion 5d and the locking concave portion 1b are not limited to one place, and may be plural places. Further, in the above embodiment, the protrusion 1a is provided on the main body case 1 side and the recess 5a is provided on the battery case 5 side, but this relationship can be reversed. That is, it is possible to form a concave portion on the main body case 1 side and a projecting portion on the battery case 5 side. Similarly, the locking recess 1b
It is also possible to reverse the relationship between and the locking convex portion 5d. Furthermore, the present invention is not limited to the electric toothbrush, and can be widely applied to tubular electric devices such as electric razors.

[0011]

The present invention is constructed as described above, and since the positioning projection can be elastically deformed in the thickness direction, it can be easily attached and detached as compared with the projection which cannot be deformed. is there. In addition, it is possible to easily separate the two cases with a small force by rotating the main body case and the battery case in relatively opposite directions and then pulling them out. Since you only need to insert it,
Easy to put on and take off, no need to change batteries, and anyone can do it easily. Further, since the tongue-shaped positioning projection has both the separating function and the locking function, the structure can be made simpler, and the structure can be made thin and small, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part.

FIG. 3 is an enlarged view of a state in which a main portion is disengaged.

FIG. 4 is a cross-sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 1a Projection for positioning 1b Locking recess 5 Battery case 5a Positioning recess 5d Locking projection

Claims (1)

[Claims] 1. A cylindrical main body case for accommodating an electric device and a cylindrical battery case removably attached to the main body case, the abutting end face of the main body case and the battery case. One of which has a chevron-shaped projection for positioning, and the other has a recess which fits into the projection, and one of the projection and the recess has a locking projection. On the other hand, a locking recess that engages with the locking projection is provided, and the projection is formed in a tongue shape so as to be elastically deformable in the thickness direction. The locking recess is for engaging the projection at a position where the projection fits into the recess, and when the main body case and the battery case rotate in opposite directions, the projection and the The recess slides on the inclined surface, the cases are separated from each other in the axial direction, and Battery power source device of the cylindrical electric device, characterized in that by releasing the engagement between Kigakaritome recess to allow axial separation of the battery case from the main body case.