JP3540379B2 - Electric razor - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an electric shaver having a plastic case.
[0002]
[Prior art]
In an electric razor, a case is assembled by connecting two case units formed of plastic. In order to firmly connect the two case units in place, both the locking claws and the set screws are firmly connected. An electric razor for connecting a case unit with both a locking claw and a set screw is described in, for example, Japanese Patent Application Laid-Open No. 2-52693. As shown in FIG. 1, the electric razor disclosed in this publication has locking claws 2 integrally formed at four corners of one case unit 1A, and a locking portion to which the locking claws 2 are hooked is used as the other case unit. (Not shown). The two case units lock the four locking claws 2 and connect three setscrews 4 by screwing.
[0003]
[Problems to be solved by the invention]
The electric shaver shown in FIG. 1 can securely connect two case units. However, there is a disadvantage that the case unit cannot be easily opened. This is because the case unit is firmly connected by the four locking claws 2 even if the three set screws 4 are removed. In particular, the locking claws 2 provided at the four corners have hook-shaped tips and are fitted and connected to the concave portions, which are the locking portions of the other case unit. It is not easy to remove the nail from the locking part. The case unit can be strongly pressed sideways to release the locking claw on one side from the locking portion. However, when the case unit is pressed in this direction, the other one of the locking claws 2 is strongly locked by the locking portion and is hard to be detached. For this reason, in order to remove the four locking claws from the locking portions, it is necessary to pull the case unit with a considerably strong force, and the locking claws may be damaged when the case unit is opened.
[0004]
It is important to remove the secondary battery when disposing of the electric shaver incorporating the secondary battery. This is because secondary batteries such as nickel-cadmium batteries contain substances such as cadmium that cause waste pollution and are therefore removed from the electric shaver to be discarded.
[0005]
As shown in FIG. 1, the case 1 that is firmly connected with the four locking claws 2 and the locking portions cannot open the case 1 easily, and it takes much time to take out the secondary battery. ing. This is an adverse effect of completely removing the harmful secondary battery and discarding the electric shaver. In particular, it is not only electricians and other specialized companies that dispose of electric razors. This is because all the electric shavers to be discarded are not brought into the electric shop. It is extremely important that the case 1 be easily opened in order to remove the secondary battery and dispose of the electric shaver in a harmless state.
[0006]
In order to realize this, the locking case and the locking portion may be omitted, and the two case units may be connected only by the set screw. However, omitting the locking claw and the locking portion makes it difficult to firmly connect the two case units. In particular, the electric razor reciprocates the inner blade, so that it vibrates considerably when used. If the vibrating electric shaver is not securely connected to the case units, there is a problem that the connecting portion is shifted. Therefore, the connection structure between the locking claw and the locking portion cannot be omitted.
[0007]
The present invention has been developed for the purpose of providing an electric shaver which can securely connect a case as a structure capable of easily removing a secondary battery.
[0008]
[Means for Solving the Problems]
The electric shaver of the present invention has the following configuration to achieve the above-mentioned object. The electric razor includes a plastic case 1, a rechargeable battery 5 that can be charged repeatedly, a motor 6 that is rotated by supplying power from the rechargeable battery 5, and a driving mechanism 7 that drives the blade by the rotation of the motor 6. And built-in.
[0009]
The case 1 is composed of two case units 1A and 1B which are plastic molded products. A locking claw 2 is integrally formed on the peripheral wall of one case unit 1A. The other case unit 1B is formed with a locking portion 3 to which the locking claw 2 is hooked and connected. The locking claw 2 is hooked on the locking portion 3 to connect the two case units 1A and 1B. Furthermore, the two case units 1A and 1B are securely connected via the set screw 4.
[0010]
Further, in the electric shaver of the present invention, the case 1 has a built-in driving mechanism 7 at one end of the casing 1, the other end of the casing 1 is provided with a plug connecting section 8 for coupling the plug. Then, the locking claw 2 and the locking portion 3 are specified and formed in one place of the case units 1A and 1B, and the locking claw 2 and the locking portion 3 are positioned between the one end and the other end of the case 1. Further, it is provided on the other end side .
[0011]
[Action]
In the electric shaver of the present invention, the locking claw 2 is provided only at one location around the plug connecting portion 8. The two case units 1 </ b> A and 1 </ b> B are connected by a locking claw 2 and a locking portion 3 provided at one location near a plug connecting portion 8, and further connected by a set screw 4. The case 1 having this structure is firmly connected to the set screw 4 via the locking claw 2 and the locking portion 3 so as not to be displaced. This is because the case units 1 </ b> A and 1 </ b> B that vibrate are prevented from being displaced by the locking claw 2 and the locking portion 3 and are securely fixed by the set screw 4.
[0012]
To open the case 1, remove the set screw 4. When the set screw 4 is removed, the case units 1A and 1B are connected at one place by the locking claw 2 and the locking portion 3. The case units 1A and 1B, which are connected to only one place, can open the side not connected to the locking claw 2 and the locking portion 3, so that anyone can easily and easily separate and open the case. Can be. Therefore, when the electric shaver is discarded, the case 1 is easily opened by removing the set screw 4, and the built-in secondary battery 5 can be removed and discarded.
[0013]
Further, in the electric shaver of the present invention, the locking claw 2 and the locking portion 3 for connecting the case units 1A and 1B are arranged near the plug connecting portion 8 on the peripheral wall of the case. The plug connection part 8 is a part for attaching and detaching a plug when charging the built-in secondary battery 5. When detaching the plug, the detaching force of the plug acts on this part of the case 1. That is, when detaching the plug, the user takes the plug and the electric razor in hand and inserts or removes the plug while shaking the plug left and right. At this time, a force is applied in a direction in which the case units 1A and 1B open from each other. In the electric shaver of the present invention, the portion where the detaching force of the plug acts is connected by the locking claw 2 and the locking portion 3. For this reason, the connection strength of the plug attaching / detaching portion can be strongly reinforced by the locking claw 2 and the locking portion 3.
[0014]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the following examples illustrate an electric shaver for embodying the technical idea of the present invention, and the present invention does not specify the electric shaver as follows.
[0015]
Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments are referred to as “claims”, “action”, and “ In the column of "means for performing". However, the members described in the claims are not limited to the members of the embodiments.
[0016]
The electric razor shown in the exploded perspective view of FIG. 2 includes a plastic case 1, a secondary battery 5 built in the case 1, a motor 6 rotated by being supplied with power from the secondary battery 5, and a motor 6. And a drive mechanism 7 for converting the rotation of the inner blade into a reciprocating motion to drive an inner blade (not shown).
[0017]
The case 1 is composed of two case units 1A and 1B which are plastic molded products. The lower case unit 1A located in the lower part of the figure protrudes from the peripheral wall 1a to form a ridge 1b. The ridge 1b is formed along the inside of the peripheral wall 1a, and is formed into a shape that fits inside the peripheral wall 1a of the upper case unit 1B. The peripheral wall 1a of the lower case unit 1A having the ridge 1b is provided with a step portion 1c into which the peripheral wall 1a of the upper case unit 1B is fitted. The peripheral wall 1a of the upper case unit 1B is fitted to the outside of the ridge 1b of the lower case unit 1A. In the case 1 connected by this structure, the positional deviation of the peripheral wall 1a of the upper case unit 1B can be prevented by the ridge 1b of the lower case unit 1A. Therefore, the upper case unit 1B and the lower case unit 1A are connected so as not to be displaced from each other.
[0018]
Further, in order to more reliably connect the upper case unit 1B and the lower case unit 1A, the locking claws 2 are formed so as to protrude outside the convex ridges 1b of the lower case unit 1A. The locking claw 2 projects outward at the upper end of the ridge 1b. The upper case unit 1B has a locking portion 3 which is a concave portion for locking the locking claw 2 inside the peripheral wall 1a. The locking claw 2 and the locking portion 3 are disposed at positions where the locking claw 2 is locked to the locking portion 3 in a state where the lower case unit 1A is fitted into the peripheral wall 1a of the upper case unit 1B. ing. Further, the locking claw 2 and the locking portion 3 are provided near the plug connecting portion 8 to reinforce the plug connecting portion 8 of the case 1.
[0019]
The electric shaver shown in the figure has a plug connecting portion 8 provided on the right side of the bottom of the case 1. The locking claw 2 and the locking portion 3 are provided on the bottom of the peripheral wall 1 a on the right side of the case 1 and are disposed near the plug connecting portion 8.
[0020]
The plug connecting portion 8 is provided on the case 1 for detachably connecting a power plug (not shown) for charging. The plug connecting portion 8 has two electrode terminals 9 inserted into the power plug. The two electrode terminals 9 are mounted on the case 1 via the insulating plate 10. A power plug is inserted and connected to the plug connection portion 8 of the case 1. In order to insert the power plug, the lower case unit 1A and the upper case unit 1B are provided with a fitting recess 11 into which the peripheral wall 1a is bent inward to insert the power plug. In the lower case unit 1A, a fixing plate 12 is formed on the rear surface of the peripheral wall 1a in order to mount the insulating plate 10 so that the electrode terminals 9 protrude from the fitting concave portion 11. An insertion gap 13 into which the insulating plate 10 can be inserted is provided between the fixed plate 12 and the peripheral wall 1a. The insulating plate 10 attached to the fitting gap 13 passes through the grooves provided on the peripheral wall 1a of the lower case unit 1A and the upper case unit 1B, and causes the electrode terminal 9 to protrude into the fitting recess 11.
[0021]
The upper case unit 1B and the lower case unit 1A are fixed with three setscrews 4 in addition to the locking claws 2 and the locking portions 3. The upper case unit 1 </ b> B has a through hole 14 that penetrates the set screw 4. The lower case unit 1A is provided with a screw hole 15 into which the set screw 4 is screwed. The set screw 4 connects two places on both upper sides of the case 1 and one place on the bottom.
[0022]
The case 1 incorporates a secondary battery 5 that can be repeatedly charged and used, such as a nickel-cadmium battery. The secondary battery 5 is mounted on a printed circuit board 16 built in the case 1. The secondary battery 5 is detachably mounted on a printed circuit board 16 via a detachable connection terminal 17. Although not shown, components forming a charging circuit for charging the secondary battery 5 are mounted on the printed circuit board 16, and the charging circuit is connected to the electrode terminals 9 via lead wires. The secondary battery 5 is connected to a motor 6 via a switch. When the switch is turned on, the motor 6 is rotated and the inner blade is vibrated. In order for the motor 6 to reciprocate the inner blade, the motor 6 is connected to the reciprocating table via a cam which is a driving mechanism 7, and the inner blade is connected to the reciprocating table.
[0023]
The electric shaver of this structure incorporates a printed circuit board 16, a motor 6, and a drive mechanism 7 in the case 1, and connects the lower case unit 1A and the upper case unit 1B. The lower case unit 1A and the upper case unit 1B connect the peripheral wall 1a with the locking claw 2 and the locking portion 3 and then securely connect the three setscrews 4 by screwing. The case 1 connected in this state is securely connected by the locking claw 2, the locking portion 3, and the three setscrews 4.
[0024]
When opening the case 1, the three setscrews 4 are removed. When the set screw 4 is removed, the lower case unit 1A and the upper case unit 1B are connected only to a part of the right bottom portion of the case 1 by the locking claws 2 and the locking portions 3. In the case 1 to which a part is connected, the left side in the figure is not connected, so that the left side of the case 1 can be easily opened. When the left side of the case 1 is opened, the locking state of the locking claw 2 and the locking portion 3 is released, and the upper case unit 1B can be easily separated from the lower case unit 1A. When disposing of the electric razor, the case 1 can be opened by removing the three setscrews 4 and the built-in secondary battery 5 can be removed and disposed. Also, when repairing the electric razor, the case 1 can be easily opened by removing the three setscrews 4.
[0025]
【The invention's effect】
The electric shaver of the present invention has the following excellent features.
(1) The two case units can be connected firmly so as not to be displaced firmly, and when discarded, there is an excellent feature that the case can be easily opened and the secondary battery can be taken out and disposed of without causing pollution. . The reason is that the electric shaver of the present invention is provided with the locking claw and the locking portion connecting the two case units only at one position on the other end side from the middle between one end and the other end of the case. is there. The electric shaver of this structure can open the case very easily by removing the set screw. When the set screw is removed, one side of the case is not connected to the case where one part of the case unit is connected by the locking claw and the locking portion. When one side of the case that is not connected is opened, the portion connected by the locking claw and the locking portion can be easily separated. In this way, the electric razor that can easily separate the two case units by removing the set screw is not limited to a specialized company, but a general consumer opens the case and removes the secondary battery, as a state that does not cause disposal pollution. It has the advantage of being discarded.
[0026]
(2) The case can be easily opened without lowering the strength of the plug connecting portion. That is, since the electric shaver of the present invention is provided with the locking claw and the locking portion for connecting the case unit on the other end side from the middle between one end and the other end of the case, the locking claw and the locking portion are provided. This is because it is located near the plug connection portion located at the other end of the case . Therefore, in the electric shaver of the present invention, the case unit does not displace when the plug is removed. Further, since the plug connecting portion can be made to have a strong structure, it is possible to prevent a defect that this portion is deformed when the plug is detached.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a conventional electric shaver case unit. FIG. 2 is an exploded perspective view of an electric shaver according to an embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 ... Case 1A ... Case unit 1B ... Case unit 1a ... Perimeter wall 1b ... Convex ridge 1c ... Step part 2 ... Locking claw 3 ... Locking part 4 ... Set screw 5 ... Secondary battery 6 ... Motor 7 ... Drive mechanism 8 ... Plug connecting portion 9 ... Electrode terminal 10 ... Insulating plate 11 ... Fit recess 12 ... Fixing plate 13 ... Fit gap 14 ... Through hole 15 ... Screw hole 16 ... Printed circuit board 17 ... Removable connection terminal

Claims (1)

A secondary battery (5) that can be charged repeatedly, a motor (6) that is powered by power from this secondary battery (5), and a blade that rotates with the rotation of the motor (6) in a plastic case (1). And a drive mechanism (7) for driving the
Case (1) incorporates a drive mechanism (7) at one end of the case (1), and a plug connecting portion for connecting the plug (8) provided at the other side of the case (1),
The case (1) includes two case units (1A) and (1B), which are plastic molded products, and a locking claw (2) is integrally formed on a peripheral wall of one of the case units (1A). The other case unit (1B) is formed with a locking portion (3) for hooking and connecting the locking claw (2), and the locking claw (2) is attached to the locking portion (3). In an electric shaver where the two case units (1A) and (1B) are connected by hooking, and the two case units (1A) and (1B) are connected via the set screw (4),
The locking claw (2) and the locking portion (3) are specified and formed in one of the case units (1A) and (1B), and
An electric razor, wherein the locking claw (2) and the locking portion (3) are provided on the other end side of the case (1) from the middle between the one end and the other end .

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