RU2450912C1 - Mechanical razor - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: proposed mechanical razor comprises fixed blade secured in case and rotary blade coupled with shaft. Shaft runs in one or two bearings fitted in said case and supports gear engaged directly with driving rack or may be engaged therewith in shaving. Tooth rack makes razor drive mechanism link driven by user hand.

EFFECT: simple design, lower costs and smaller sizes.

10 cl, 3 dwg

Description

The razor refers to devices designed for dry shaving with a hygienic purpose and having a manual drive.

A small-sized and relatively simple in design mechanical razor is known, the movable knife of which is driven in periodically-reverse rotation by a shaft mounted in the razor body with two bearings, in the space between which having a coil with a drive belt wound in it, and also associated with the housing by means of a return spring / US Pat. RU 2206443, B26B 19/32 /.

However, with all its relative simplicity, such a razor is still quite complicated, which means that it is expensive for, for example, the possibility of its mass inclusion in cheap hygiene supplies as part of humanitarian aid in various emergencies / where it is preferable due to lack of amenities and due to with sanitary and epidemiological tension - it is mechanical shavers for individual use / and a number of other cases where long-term use of the razor is not supposed, but its cheapness is in demand but.

The task to which the claimed invention is directed is to create the simplest and cheapest mechanical razor, even if it does not have durability and maintainability.

The result of the technical solution is the extreme simplicity of the razor drive in the respective embodiments of the device, consisting of only two or three parts, except for the razor body /, with its good performance and small size. The mentioned simplicity of the design is a prerequisite for low cost razor.

The mentioned problem is solved and the indicated results are achieved by the fact that in a mechanical razor containing a fixed fixed knife and connected to a shaft mounted in the razor body with one or two bearings, the knife rotates, said shaft has a gear / gear wheel / directly coupled or mating with a gear rack, which is the leading, taken hand of the user and her moving link of the razor drive mechanism.

During shaving, the translational-translational movements of the rack are converted by the gear on the razor shaft into the periodically-reverse rotation of this shaft and the movable knife connected to it. In preferred embodiments of the razor, the working cutting stroke of her knife corresponds to the extension of the rail.

The razor's simplicity, its small size and / potential / cheapness are ensured by the fact that the gear rack is connected to the shaft gear directly, without any additional gear, inertial or ratchet mechanism. The mechanical razors known to the author, also containing a gear rack as the leading link in its drive mechanism, are not consumer analogues of the razor because of the complexity of this mechanism and the scheme of its operation, and are not exposed as prototypes.

In various embodiments of the device, the razor gear is either provided with structural elements guiding its position (for example, a guide opening in the razor case), or the rake is pressed away from the gear and the correct orientation is maintained first by the hand of the user himself, which is transmitted by a low torque transmitted through the razor shaft is practically possible.

The gear / gear / on the razor shaft is mounted, machined on it or, preferably, molded with it as a unit of structural plastic. Preferably, the plastic bearings are bearings or a razor bearing. The shaft is preferably connected to the movable knife by one of the joints used in such cases.

In appropriate embodiments, the shaver body has the dimensions of the key fob: diameter - about 20 mm. length - 25 mm. The gear rack has a length of 6-10 cm.

In the first preferred embodiment of the razor, the gear of its shaft is located in the space between its two bearings, in front of the front / closest to the knives / of which there is a chamber for shaved bristles and there is a pressing / compressing knives / coil spring on the razor shaft.

The option has the dignity of protection / front bearing / gear from shaved bristles getting into it. In various embodiments of the device, a removable shaving head may or may not be present.

In the second version of the razor, its rear of the bearings or the only bearing is angular contact (i.e., a thrust bearing) mounted in the razor body with the possibility of axial displacement up to the stop of the shaft with a movable knife installed in it into the stationary razor knife, while the back side of the razor the bearing is open to the user's hand, and the razor does not have a clamping spring. In the process of shaving, the necessary compression of the knives is done by pressing the user's finger or fingers on the thrust bearing open on the rear side of the razor body / pressure on the knives is transmitted through the shaft /. Corresponding installation of the bearing is provided by one of the methods known for such tasks.

In the third version of the razor for its gear rack in the housing there is a profile guide opening that defines the normal relative position of the rack and gear on the shaft. Such guides for gear racks are known in the art.

In the fourth version of the razor, its gear rack and case are connected by a cord or strap, preventing their disintegration.

In the fifth version of the razor, the cord or strap connecting the case to the gear rack, having the appropriate length, is also a suspension cord or strap of this razor, which allows, for example, to be worn around the neck, which is relevant for some conditions of its use.

In the sixth version of the razor, its body and gear rack are equipped with a connecting device, which also allows the possibility of their quick, if necessary, separation. The device, characterized at a functional level, prevents the disintegration of parts of the razor during storage and, in embodiments of the device, complements the cord or strap of the razor. We use, for example, a miniature wire carbine.

In the seventh embodiment, the razor its fixed knife is fixed in the front end of the housing / preferably cylindrical /, which is provided with holes for removing shaved bristles. Two to four holes are preferred. The bristles are easily removed, for example, by blowing. An embodiment has the advantage of simplicity / there is no conventional shaving head / and of small size.

In the eighth version of the razor, it contains two parts made of plastic, each of which is a half-housing integrally with the bearing or bearing segments, while in the front parts of such halves there are annular grooves-nests for the rim of the fixed knife and holes for removing the bristles. The halves of the housing are connected in a manner known in the art for similar parts, for example, by means of locks available on sections of the halves of the housing. The variant is notable for its constructive simplicity: except for a knife pair with a clamping spring, a razor can contain only four parts.

In the ninth embodiment of the razor, its shaft has a handle extending from the back of its body, allowing the shaft to be rotated directly with fingers. The handle is a separately executed part mounted on the tail / extending behind the rear or single bearing / shaft part or this shaft part itself has the shape and properties of the handle, for example a corrugated surface. Shaving by rotation of the handle has a low productivity and its mechanism, which is practically not susceptible to breakage, is auxiliary, is used when the gear mechanism fails, for shaving, in the cramped conditions of using a razor, for example, in a sleeping bag.

To clarify the essence of the device, drawings are attached, in which Fig. 1 shows a razor in 1, 3, 4, 5, 7, and 9 variants; figure 2 - razor in the second, third and seventh versions; figure 3 - structural elements of the razor in its eighth embodiment.

The razor / FIG. 1/ comprises a cylindrical body 1, in the front end of which a fixed knife 2 is fixed with a rotating knife 3 embedded in it, with its corresponding socket connected to the front profiled end of the shaft 4 mounted in the housing on bearings 5 and 6, in the space between which on the shaft there is a gear 7, which engages with the teeth of the gear rack 8, inserted into the guide, profiled over the cross section of this rack, the opening 9 in the razor body. The movable knife is pressed against a fixed cylindrical clamping spring 10, worn on the shaft in the space between the knives and the front bearing 5, which, separating the space behind the knives from the gear, forms a bristle chamber equipped with two holes 11 in the side walls of the housing for removing it. The tail part of the shaft is brought out of the housing through the rear bearing and is equipped with a corrugated handle 12, which allows this shaft to be rotated by rolling the handle in the fingers. The gear rack and the razor body are connected by a cord 13, which prevents their disintegration and in length can serve to carry the razor around the neck.

When shaving, the gear rack is inserted into the guide opening of the housing and its teeth mesh with the gear teeth. The operating mode of the movable razor knife is periodic: when pulling the rails, the knife makes a working cutting stroke, with the reverse movement of the rails - idle return stroke. With one hand, the rail is moved, with the other - the razor body with a fixed knife is pressed against the skin and moves along it, while the movements resemble scrapers. The bristles are removed by blowing into the holes. In case of failure of the gear mechanism of the razor drive or, for example, when shaving, it is also possible to rotate the shaver shaft and shave with the handle. The method has low productivity, but is trouble-free, and, as is the case with blade razors, it is specifically pleasant.

In another embodiment of the razor (Fig. 2/), a fixed knife 2 is fixed in front of its body 1, the blade in which the knife is rotated (not shown) is connected with its corresponding socket to the front profiled end of the shaft 4 installed in the razor body on bearings 5 and 6 , in the space between which there is a gear 7 on the shaft, which can engage with the teeth of the rack 8, which is inserted into the guide opening 9 in the razor body. The rear bearing 6 is radially thrust / thrust bearing / mounted axially displaceable in the housing, - until the shaft of the rotary knife in the socket is mounted against it, the pins protruding from the bearing are provided with sockets in the side walls of the razor body that the pins enter with sufficient play / . In the front, behind the knives, part of the body on its side walls there are openings 11 for removing shaved bristles. The back side of the thrust bearing is open to the user's hand.

In the process of shaving, accompanied by reciprocating movements of the gear rack inserted into the guide opening of the razor body and periodically reciprocating rotation of the razor’s movable blade, the finger holding the razor shell of the user's hand exerts pressure on the rear bearing, which in turn transfers pressure to the shaft and the razor’s movable knife pressing one to the motionless. The shaved bristles are removed from the razor by blowing into the openings of the body.

Figure 3 presents the structural elements of the razor in its eighth embodiment, where IA and IB are halves made integrally with the bearing segments of the razor body, in their front part having ring mounting sockets 14 for the rim of the fixed knife 2, holes to remove the bristles 11 and the locks 15 / protrusions and their corresponding nests / on their sections, allowing these semi-bodies to be fastened.

Claims (10)

1. A mechanical razor comprising a fixed knife fixed in the housing and a rotary knife connected to the shaft, the shaft being mounted in the housing on one or two bearings, characterized in that a gear wheel is located on said shaft that is directly mated or which is adapted to mate with the drive gear rack during shaving, while the gear rack is a link in the razor drive mechanism, driven by the user's hand. 2. The razor according to claim 1, characterized in that the gear is located in the space between the two bearings, while in front of the front bearing there is a chamber for shaved bristles, in the space of which there is a pressure spring compressing the razor knives on the razor shaft. 3. The razor according to claim 1, characterized in that the bearing located on the rear end of the housing, which is made radially thrust to perform the function of the clamping spring, is installed in the razor housing with the possibility of axial displacement to the stop of the shaft installed in it with a rotating knife in a fixed razor knife, while the rear side of said bearing is open to the user's hand. 4. The razor according to claim 1, characterized in that a profile guide opening is made in the razor body for the toothed rack. 5. The razor according to claim 1, characterized in that the housing and the gear rack are connected by a cord or strap, preventing their separation. 6. A razor according to claim 5, characterized in that the cord or strap has an appropriate length and are also suspended, suitable for wearing this razor, in particular on the neck. 7. The razor according to claim 1, characterized in that the casing and the gear rack are equipped with a connecting device, providing the possibility of both quick connection and disconnection. 8. The razor according to claim 1, characterized in that the fixed knife is fixed in the front end of the body, which is equipped with holes for removing shaved bristles. 9. The razor according to claim 1, characterized in that it contains two parts made of plastic, each of which is a half-housing integrally with the bearing segments or bearings, while in the front parts of such halves there are annular sockets for the rim of the fixed razor knife and openings for remove shaved bristles. 10. The razor according to claim 1, characterized in that the shaft has a handle extending from the rear of the housing and allowing this shaft to be rotated directly by the fingers of the user's hand.

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