DE2451527A1 - TAPE MEASURE - Google Patents

Description

Rabone Chesterman Limited, Whitmore Street, Birmingham " England

Tape measure·

The! Invention relates to tape measures, the tape on a drum is wound up, which is rotatable between a pair of side parts arranged at a certain distance from one another is provided.

The invention is based on the object of designing such a tape measure in an expedient form.

The tape measure according to the invention has a combination of the following Split up: a couple of relatively solid, spaced apart side parts, one in between extending hollow winding core and to the side parts rotatable a band drum, which on the winding core between the side parts is rotatably mounted, a hand crank which is rotatably mounted on the winding core to the movement between to carry out the working and empty positions, a clutch— member which is arranged axially displaceably in the winding core, this coupling part at least one laterally. extending protrusion which extends through a slot in the hub for engagement with a tooth on the drum cooperate, elastic means bring the coupling part axially in a direction to the part with the tooth outside To create engagement, and a cam on the hand crank, the movement of the hand crank in the working position of the coupling part presses against the elastic means to couple the winding core to the drum.

The invention is explained in more detail in the accompanying drawings using an exemplary embodiment:

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Figure 1 and Figure 2 are sectional views through an embodiment the invention.

In the drawings, a few side parts 10 are shown, which are connected to one another and one is not shown Have hand crank. On the side parts a winding core is rotatably mounted, which has the reference number 11, which is a has hollow cylindrical sleeve 12 which is provided at one end with a, a whole forming flange 13 and a Cap 14 · has which at the end of the sleeve 12 opposite the flange 13 by means of a through bolt 15 is attached, which also serves to a hand crank 16 to be rotatably attached to the winding core.

A pair of bearing bushes 17 provided with a flange are arranged between the bush 12 and the corresponding side parts 10, the flanges of which bear against the inwardly directed lips on the flange 13 and on the cap 14, respectively. Between the side parts 10, a drum is mounted on the sleeve 17, onto which the tape measure can be wound _{or the like}

The drum 18 consists of an outer K _r anz 18a, an inner ring 18b and a connecting web 18c. On the inner circumference of the inner ring 18b there is a projection 18d consisting of the same part, on which axially extending teeth 18e are arranged. On the inner periphery of the outer rim 18a are a number (e.g. four) equally angularly spaced ratchet teeth (not shown), each having a substantially radially extending side and a curved, cam-shaped side for a purpose to be described having.

In the sleeve 12, a coupling element is arranged axially displaceably, which has a pair of diametrically opposite, laterally extending parts 20, which in eir

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pair of diametrically opposite slots are displaceable, which are arranged in the wall of the sleeve 12. The coupling element 19 is pressed against the inner side of the hand crank 16 with the aid of a helical compression spring 21, which is arranged between the part 19 and a closed end of the sleeve which is between the flanges 13 is arranged. The inside of the hand crank 16, which is arranged in a recess in the cap 14- is with a cam shape 16a provided, which is designed so that when the hand crank 16 to the pivot pin 15 from the empty position, the is shown in the drawings, is moved into the working position in which it is to the Lafce shown by 180 ° is offset, the coupling element 19 is pressed against the spring that the parts 20 between the teeth 18c of the drum come into engagement so that the winding core is coupled to the drum 18 together with its hand crank.

On one of the side parts 10, a brake part 22 is arranged so as to be radially displaceable relative to the winding core 11, on which a Abutment 23 is arranged or attached and can be brought into a position that it with the (not shown) teeth cooperates on the inner circumference of the outer rim 18a of the drum.

When the brake part 22 and the winding crank. 16 both move into their empty position, the tape measure can be pulled freely from the drum while the drum is around the bearing bushes 17 rotates and the winding core 11 with respect to the side parts 10 is stationary. When enough tape measure is unwound from the drum, the brake part 22 can be brought into working position, the abutment 23 is stopped and the Rotational movement of the drum is continued, through contact with the substantially radial surface of one of the (not shown); Teeth on the wreath 18a. When the tape measure is to be rolled up, the crank 16 is out of position

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brought out, which is shown as the working position, the winding core is coupled to the drum, making it possible is that the drum is rotated by the hand crank · With the help of the cam shapes of the teeth of the ring 18a that Brake part 22 is automatically moved to the idle position by rotating the drum in the direction of the winding movement.

The construction described has the advantage that some or all of the parts can be made of plastic and provides for the quick use of the tape measure, where it is possible to brake the drum against the winding direction, the coupling of the crank handle with the drum and the automatic release the braking device when the drum is rotated in the winding direction of the tape measure.

Expectations

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Claims (1)

claims 1) 1 tape measure, consisting of a combination of the following parts: ^ - a couple of fixed, spaced apart Side parts, a winding core extending therebetween and a measuring tape which is relatively rotatable with respect to the side parts and which is placed on the winding core between the side parts is rotatably mounted, a hand crank, which can be rotated for movement between the working and idle positions is mounted on the winding core, a coupling part which is axially displaceable in the winding core, wherein the coupling part has at least one laterally projecting part, which dirch a slot in the Winding core extends to cooperate with a tooth on the drum, elastic means which press the coupling part axially in one direction around this part with the tooth disengage and a cam on the crank handle moving the crank handle into the working position moves the coupling part against the elastic means in order to couple the winding core with the drum. 2} tape measure according to claim 1, wherein the coupling part two diametrically has laterally opposite projections, which extend through a few slots in the winding core and wherein the drum has axially extending teeth optionally associated with said parts in FIG Are engaged in order to couple the winding core with the drum. 5) tape measure according to claim 1 or 2, wherein der.Windelkern from a hollow cylindrical sleeve which is closed at one end and has a flange which with her together consists of one part, 'as well as a cap that on. other end of the sleeve is attached, with the help - 6 - '■ 509821/0277 a through bolt, which also serves to connect the hand crank to the winding core in a rotatable manner. A tape measure according to any one of the preceding claims, wherein the drum has an outer rim on the interior thereof Circumference, leaving an angular gap, a number of ratchet teeth is arranged, which is optional cooperate with a braking part which is radially displaceable on one of the side parts relative to the winding core is arranged 509821/0277 Blank page