CN2133827Y

CN2133827Y - Watch type hand balance

Info

Publication number: CN2133827Y
Application number: CN 92233609
Authority: CN
Inventors: 应跃宣
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-18
Filing date: 1992-09-18
Publication date: 1993-05-19
Anticipated expiration: 2002-09-18

Abstract

The utility model relates to a watch type hand balance, which comprises an outer shell, a metering dial, and a pointer, a mechanical gear mechanism comprising a pointer shaft gear and a hairspring, and a lever spring system comprising a weighing spring, a bearing rod and a regulating spring. The key point is that the lever spring system also comprises a C-shaped rack gear lever; the upper part of the C-shaped rack gear lever is a cambered rack gear, the lower bent opening is a movable fulcrum, and the lower part is a lever. The bearing bar, the weighing spring and the regulating spring are respectively connected at the middle part, and the end part of the lever and between the middle part and the end part of the lever. The watch type hand balance has the advantages of large applicability, high precision of sensing quantity, uneasy swing and drift of the pointer, less malfunction, simple structure, low manufacturing cost, etc. In particular the volume of the watch type hand balance is only 70*40*20 millimeters.

Description

Watch type hand balance

The utility model belongs to measurement instrument, relates to a kind of tabular form portable scale.

Existing wood steelyard inconvenience is carried, and easily does trick; Though the portable band of spring balance is easy to failure; The electronic scales cost is very high, and inconvenience popularizes.Chinese patent discloses two kinds of tabular form portable scales, and application number is " the portable dial scale " of 88211428.x, and full dose has only five kilograms, sensibility reciprocal 25 grams, and volume is bigger, and the scope of application is little, can only be used for family; " tabular form portable scale " sensibility reciprocal of application number 91226786.0 can reach 10 grams, but complex structure, cost * height, be difficult for producing assembling, pointer easily rocks drift.

The purpose of this utility model provide a kind of simple in structure, cost is low, the tabular form portable scale of easy production assembling, sensibility reciprocal precision height, working stability.

The utility model comprises shell, gauging table, mechanical gear mechanism and arm spring system, a needle pivot gear and hairspring are contained at least in mechanical gear mechanism, the arm spring system contains weighing spring, regulating spring and bearing bar, its main points are: the arm spring system also contains C shape tooth bar lever, the top of C shape tooth bar lever is the arc-shaped rack with the needle pivot gear mesh, the bottom is a lever, following bent port part is joined the location fulcrum for living, and middle part, end that an end of bearing bar, weighing spring and the middle part of regulating spring are connected on lever respectively reach between the two.Convenient for production and processing, C shape tooth bar lever also can be made of phase mutual connection solid anti-7 font arc-shaped racks and lever, also can by lower end and upper end mutually solid anti-7 font arc-shaped racks and the L shaped lever of mutual connection constitute; Lever can adopt two of the same form, and with anti-7 font arc-shaped racks, regulating spring, clamping are on corresponding position, and fulcrum, bearing bar, weighing spring work are joined to be installed on the corresponding position or to be connected on the cutter that is installed on the relevant position and held, in order to improve stability; For balance and stability C shape tooth bar lever, make pointer be difficult for rocking, the balance and stability spring is housed on the fulcrum of lever bent port part; For reduced volume, improve the sensibility reciprocal precision, increase full dose, can be provided with two needle pivot gears and corresponding two gauging tables, transition gear and coaxial transmission gear also can be housed, arc-shaped rack can be with needle pivot gear mesh or meshing with transition gear; For the buyer and seller's while convenient reading, also can identical pointer be housed, and all be provided with corresponding dial plate at the tow sides of scale at needle pivot gear two ends, promptly the tow sides at scale all are provided with identical gauging table, show simultaneously to calculate the weight; For easy to assembly, regulating spring can also can be contained in mechanical gear mechanism in the two clamping plates with two regulating springs are alternative up and down.

The utility model can be according to different needs preparation full dose and sensibility reciprocals, and the scope of application is big, and metering accurately; Adopted lever, spring, gear structure, not easy to failure; Adopted C shape tooth bar lever, simplified the structure, not only be convenient to assembling but also reduced cost; The balance and stability spring is housed on fulcrum, and pointer is difficult for rocking when making weighing; Two gauging tables can be housed, not only improve the sensibility reciprocal precision but also dwindled volume greatly, particularly kilogram amount metering dial plate and pointer are located in the gram amount metering dial plate; The tow sides of scale all are provided with identical gauging table, are convenient to the buyer and seller reading simultaneously, and are very convenient; It is a kind of desirable tabular form portable scale.

Below in conjunction with embodiment and accompanying drawing thereof the utility model is described in detail:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is mechanical gear mechanism of the present utility model and arm spring system architecture synoptic diagram;

Fig. 3 is a mechanical gear mechanism cross sectional side structural representation;

Fig. 4 is an arm spring system architecture synoptic diagram;

Among the figure: (1) shell; (2) handle connects part, makes with metal, can omit, and available hand is directly held shell (1) and mentioned; (3) and (4) be respectively gram amount metering dial plate and pointer, the dial scale scale division value is 5 grams, a circle is 500 grams, is used for the indication of gram amount; (5) and (6) be respectively kilogram a metering dial plate and a pointer, be located in the gram amount metering dial plate, the dial scale scale division value is 0.5 kilogram, full dose is 2.5 kilograms, is used for the indication of kilogram amount, the maximum scale value sum that two pointers (4,6) streak is for claiming the thing full dose; (8) balance and stability spring is used for stablizing C shape tooth bar lever (9), the swing of pointer when reducing weighing; (9) C shape tooth bar lever, top are arc-shaped rack (9a), and the bottom is lever (9b); (12) be mechanical gear mechanism clamping plate, establish for convenient for assembly.When being claimed that thing is placed on or hangs on the scale pan on the bearing bar (7) or the steelyard hook, to claim thing to mention as long as connect the handle on the part (2) or directly hold shell (1) with hand with handle, claim thing weight to act on lever (9b) middle part of C shape tooth bar lever (9) bottom by bearing bar (7), the edge of a knife that makes the cutter of the following bent port part of C shape tooth bar lever (9) hold fulcrum is that circular motion is done in the center of circle, make one to terminate on lever (9b) end, the weighing spring (15) that the other end is connected on the null setting (19) stretches, and makes an end all be connected on the other end on bearing bar (7) and the end lever (9b) between not respectively all to be connected on adjusted spring (16) and following regulating spring (17) stretching on the shell (1) and to compress; And by arc-shaped rack (9a) drive on top transition gear (14) rotation meshing with it, by transmission gear (13) drive with it meshing gram amount needle pivot gear (11) rotation coaxial with transition axis gear (14), drive kilogram amount needle pivot gear (10) rotation by gram amount needle pivot gear (11) again, make pointer (4,6) upward refer to mark scale at dial plate (3,5).After weighed object takes off, recover at weighing spring (15) and adjusted spring (16), regulating spring (17) stretches and is contained under the effect of the hairspring (19) on the kilogram amount needle pivot gear (10) down, the rapid return of mechanism and system, pointer (4,6) also is returned to zero-bit rapidly.The zeroing reason is identical, because of zeroing is to be shifted up and down by the part that is connected with weighing spring (15) one ends on the null setting (18) weighing spring (15) stretching, extension or compression are realized; Obviously, null setting (18) also can be contained on the regulating spring (16 or 17).Because gram amount needle pivot gear (11) is different with the diameter of kilogram amount needle pivot gear (10), so rotation radian difference, metered amount is also just different; Therefore, amount increases or dwindles full dose very easily as required, improves the sensibility reciprocal precision; In like manner, also can adopt coaxial and diameter is different two drive two needle pivot gears with the transmission gear of two needle pivot gear mesh respectively.Obviously, transition gear (14) and hairspring (19) can be contained on the needle pivot simultaneously, or are contained on the driving gearshaft, also can separately adorn.Owing to adopted two gauging tables, especially kilogram amount metering dial plate (5) and pointer (6) are arranged in the gram amount metering dial plate (3), dwindled volume greatly, volume has only 70 * 40 * 20 millimeters.

Claims

1, a kind of tabular form portable scale, comprise shell (1), the metering dial plate, pointer, mechanical gear mechanism and arm spring system, needle pivot gear and hairspring (19) are contained in mechanical gear mechanism, the arm spring system contains weighing spring (15), regulating spring and bearing bar (7), it is characterized in that: the arm spring system also contains C shape tooth bar lever (9), the top of C shape tooth bar lever (9) is arc-shaped rack (9a), arc-shaped rack (9a) and needle pivot gear mesh, the bottom is lever (9b), following bent port part is joined location fulcrum, bearing bar (7) for living, one end of weighing spring (15) and the middle part of regulating spring are connected on the middle part of lever (9b) respectively, the end reaches between the two.

2, tabular form portable scale according to claim 1, it is characterized in that: C shape tooth bar lever (9) is made of the solid anti-7 font arc-shaped racks of phase mutual connection and lever or L shaped lever, lever can adopt two of the same form, the location fulcrum of joining alive is located at the junction of anti-7 font arc-shaped racks and lever, or is located at the bent port part of L shaped lever.

3, tabular form portable scale according to claim 1 and 2 is characterized in that: live in joining on the fulcrum of location balance and stability spring (8) is housed.

4, according to claim 1,2 or 3 described tabular form portable scales, it is characterized in that: regulating spring can be with two springs (16,17) are alternative up and down.

5, according to claim 1,2,3 or 4 described tabular form portable scales, it is characterized in that: a transmission gear (13) with the needle pivot gear mesh is housed in the mechanical gear mechanism, and transition gear (14) coaxial with transmission gear (13), arc-shaped rack (9a) is meshing with transition gear (14), hairspring (19) is contained on the axle of needle pivot gear (10 or 11), perhaps is contained on the axle of transition gear (14).

6, according to claim 1,2,3,4 or 5 described tabular form portable scales, it is characterized in that: two needle pivot gears (10,11) are housed in mechanical gear mechanism, and be provided with two corresponding dial plates and pointer, or on a dial plate (3), be provided with two root pointers (4,6) and corresponding scale.

7, tabular form portable scale according to claim 6, it is characterized in that: in the mechanical gear mechanism, two meshing and coaxial with transition gear (14) two transmission gears with two needle pivot gears (10,11) respectively are housed, and arc-shaped rack (9a) is meshing with transition gear (14).

8, according to claim 1,2,3,4,5,6 or 7 described tabular form portable scales, it is characterized in that: zeroing machinery (18) is housed on weighing spring (15) or regulating spring.

9, according to claim 1,2,3,4,5,6,7 or 8 described tabular form portable scales, it is characterized in that: the tow sides at scale all are provided with identical gauging table.

10, according to the tabular form portable scale of claim 1,2,3,4,5,6,7,8 or 9 arts, it is characterized in that: be provided with movement clamping plate or mechanical gear mechanism clamping plate (12), the fulcrum on the C shape tooth bar lever and tie point all adopt cutter to hold hole and corresponding cutter and hold to live and join the location and be connected.