CN86201642U - Circular spring balance with zero point adjustable means - Google Patents

Abstract

The utility model discloses an adjustable pocket scale is mainly composed of two compression springs, a spring guide post, a slide plate, a driving belt, a belt wheel, zeroing knob, etc. The pocket scale adopts a pointer and a circular dial scale to indicate the reading of the weighed object; therefore, the volume is smaller, the calibration is thinner, the reading is more visual, and the carrying is convenient. The adjustable pocket scale has the zeroing function that the pointer is adjusted to the zero after weighing the object for the first time, and then an object is added to weigh so that the weight of the weighed object for the second time can be directly read out, which saves the calculation trouble. The adjustable pocket scale has a trim mechanism formed by a conical screw cap and the thin wall belt wheel; the trim mechanism is used to correct the error.

Description

Circular spring balance with zero point adjustable means

The utility model is a kind of portable coil component spring scale.

Existing spring balance be by an extension spring with direct slide, the microscler spring balance of in line scale indication owing to be subjected to the restriction of design itself, volume can not be very little.For dividing thin scale to have to do the scale body very long, inconvenience is carried.In addition, the existing mechanical scale does not generally possess zeroing function (can remove the container Heavy Weight and regulate pointer to zero function) and must weigh up container weight in advance, carries out at last calculating rejecting.

It is a kind of with pointer indication that the utility model provides, and index dial is circular, and volume is less, and scale is thinner, the spring balance of size shape such as pocket-watch---the bosom scale.Its reading is more directly perceived, has the function of zeroing and correction error.

Its solution is: two compression springs are installed in circular housing, there is a pressure spring plate spring upper end, the pressure spring plate middle part has slide plate to connect hook, compression spring when article have been colluded in hook, because the decline of slide plate, band on the slide plate makes the belt wheel rotation, thereby drives and the pointer rotation of belt wheel on same axle, and last indicating graduation is read Item Weight.

The zeroing button is equipped with in the rear end of weigh-shaft, as long as twisting zeroing button is held slide plate and made it not mobile, the friction force that just can overcome between band and the belt wheel makes it to slide, and can make pointer point to zero once more when needed.

Belt wheel wheel end has groove, utilizes tapered cup nut top when revolving along screw thread spool belt wheel is strutted, thereby scalable belt wheel external diameter size to be adjusted various errors to belt wheel.

The zeroing function that this device has, make and claim that thing is more convenient, particularly use different containers (as: scale pan, bag etc.) when repeatedly article-containing is weighed, just can directly read the weight that is claimed article when claiming thing again after only needing earlier container weight to be weighed up, returns to zero, need not pick out should calculating of container weight.

Concrete structure of the present utility model is provided by following examples and accompanying drawing.

Fig. 1 is the profile front view of scale.

Fig. 2 is that cut-open view is looked on the left side of scale.

Fig. 3 is the front view of the broken section of scale.

More than among each figure:

1, scale core trip bolt; 2, front axle board; 3, spring stack; 4, spring; 5, support; 6, spring stack trip bolt; 7, pressure spring plate; 8, slide plate; 9, scale handle; 10, be with screw admittedly; 11, band; 12, index dial; 13, bandage spring; 14, pointer; 15, belt wheel; 16, adjustable plate; 17, zeroing button; 18, axle; 19, tapered cup nut; 20, hook; 21, shell; 22, packing ring; 23, glass lid.

With reference to each figure, the movement of device in scale shell ［ 21 ］, tighten together by two screws ［ 1 ］ and scale shell, the slide plate ［ 8 ］ that can slide up and down is arranged on the movement, when portable scale handle ［ 9 ］, slide plate moved down when hook ［ 20 ］ go up to hang weight, drive simultaneously also to move down with its fastening pressure spring plate that connects ［ 7 ］, and compress two springs ［ 4 ］ along spring stack ［ 3 ］ to lower compression stop motion during until spring anchorage force and thing weight balance.In gear train band ［ 11 ］ (band can be that nylon tape or other material are made) strip winding ［ 15 ］ one weeks of wheel, the band two ends anchor on the slide plate ［ 8 ］, under bandage spring ［ 13 ］ effect, belt wheel ［ 15 ］ are had certain friction force; When slide plate moves down, the rotation of drive belt wheel, thereby axle ［ 18 ］ is rotated, axle drives pointer ［ 14 ］ again and rotates, and indicates the scale on the index dial ［ 12 ］, just can read weight, when weight is cancelled, each is resile under the spring force effect partly, and this moment, pointed zero, used so repeatedly.

The guiding of slide plate lower end is to divide to come like this to finish: support ［ 5 ］ lower end central authorities have rectangular opening ［ c ］, only as the displacement (guiding) of controlling the slide plate fore-and-aft direction, and by shell ［ 21 ］ displacement (guiding) of stomidium ［ d ］ control slide plate left and right directions down, hole ［ d ］ and slide plate ［ 8 ］ fore-and-aft direction gap are bigger, the difficulty that slide plate lower end oblique cutting is gone into the hole ［ d ］ on the shell in the time of can solving movement and pack shell into.

The front end of axle ［ 18 ］ is supported by support plate ［ 2 ］, the rear end is supported by bracket holes, rear end scale shell has zeroing button ［ 17 ］ outward, as long as hold the slide plate lower end, make it and can not move, twisting zeroing button ［ 17 ］ overcomes the friction force between band ［ 11 ］ and the belt wheel ［ 15 ］ again, make it to slide, just pointer can be adjusted to repeatedly zero, when normal the use, between band and the belt wheel certain friction force is arranged, skidding can not appear without reason.

One end wall of belt wheel ［ 15 ］ is thinner, has groove.Utilize tapered cup nut ［ 19 ］ along screw thread rotation the time, to push up the usefulness of regulating various foozles to belt wheel, adjusting belt wheel external diameter size, conduct, during adjusting, stretch into title shell rear end aperture with hard thing and block adjustable plate ［ 16 ］, again twisting zeroing button ［ 17 ］, debug, i.e. recoverable error.Make the scale indication more accurate.

The support lower central has a small boss to cooperate ［ b ］ with aperture on the index dial, rotate freely to prevent index dial ［ 12 ］, and the support on index dial plane is that the height by support, support plate equates to finish jointly.

Glass lid ［ 23 ］ can be fabricated to one with packing ring ［ 22 ］.

This device is finished by glass lid ［ 23 ］ encapsulation at last.Glass lid ［ 23 ］ available various transparent materials are made.

This device can use same movement, as long as replace simultaneously the different spring of a pair of specification and a corresponding dial, just can be made into the different scale of various amount limits. Can the amount of making be limited to 0.5Kg, 1Kg, 2Kg etc. such as it, to be suitable for different purposes.

Claims (3)

1, a kind of portable scale of forming by shell [21], glass lid [23], pointer [14], index dial [12], hook [20], it is characterized in that being provided with in the scale by two compression springs [4], spring stack [3], support [5], pressure spring plate [7], slide plate [8], band [11], belt wheel [15], front axle board [2], the movement that axle [18] is formed.And place band [11] on the slide plate on belt wheel [15], by axle [18] pointer [14] is rotated thereby can drive the belt wheel motion.During the zeroing button [17] of turning axle [18] rear end, can overcome friction force between band [11] and the belt wheel [15] and cause and slide and make pointed zero.Awl nut [19] is housed on the axle [18], can screws in belt wheel [15], have groove on the belt wheel, when the awl nut screws in, can change pulley diameters, can carry out the error adjustment.

2, by the described scale of claim 1, the guiding that it is characterized in that the slide plate lower end is separately to finish like this; Support ［ 5 ］ lower end central authorities have rectangular opening ［ C ］ only as displacement before and after the control slide plate.By shell ［ 21 ］ rectangular opening ［ d ］ control slide plate left and right displacement, and hole ［ d ］ front and back and slide clearance broad, when packing shell ［ 21 ］ into to solve movement, the slide plate lower end can oblique cutting hand-hole ［ d ］.

3, by the described scale of claim 1, it is characterized in that using same movement,, just can be made into the scale of different amount limits by replacing another spring and corresponding index dial different to specification.

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