CN210011494U - Automatic number machine returns to zero - Google Patents

Abstract

The utility model discloses an automatic numbering machine returns to zero, including the fluting shell, the knob that returns to zero, knob fluting ground axle, interior convex jump ring character wheel, the spring that returns to zero etc, the outer circumference linear distribution inner groovy of knob fluting ground axle, the downthehole locating piece that returns to zero withstands the inner groovy, return to zero the spring top and withstands the recess in interior convex jump ring character wheel connecting hole, the zero position corresponds the position of the zero digit of interior convex jump ring character wheel, the utility model discloses when needs are returned to zero and are adjusted, because the spring top that returns to zero satisfies to withstand the zero digit that interior convex jump ring character wheel corresponds interior convex jump ring character wheel, the characteristic of one-way intermittent motion mechanism rotates rotatory knob a week that returns to zero along same direction, can easily return to zero, need not to use promotion number runner of dial rod, be difficult for makeing mistakes.

Description

Automatic number machine returns to zero

Technical Field

The utility model belongs to the technical field of the printing and specifically relates to an automatic numbering machine returns to zero.

Background

The automatic numbering machine is a professional product for printing serial numbers which are continuously changed on pages such as printing bills or tables, is suitable for automatically printing various anti-counterfeiting marks of different characters and graphs, product serial numbers and VIN codes on workpieces with various shapes and materials, and automatically counts the printing quantity. The method has wide market application, such as serial numbers of various bills, account numbers, certificates and the like, and production batch numbers of factories and the like. The functional requirements of a user on serial number printing, space number printing, fixed number printing and the like of the number can be met. Its functions can be divided into special number machine for offset press, special number machine for invoice font, combined jump number machine, special non-setting adhesive number machine for trade mark, rotary number machine, date number machine for seal, number machine for account number and printing number, number machine for meter counting and printing, certificate number machine, number machine for check, etc. according to different purposes. Meanwhile, the automatic numbering machine can be matched with a printing machine for use, and difficult dynamic printing can be realized. The numbers can be automatically numbered when one sheet is printed, and the numbers can be increased or decreased progressively.

The traditional automatic numbering machine can not return to zero once when returning to zero, but needs to push the numbers on the number rotating wheel forwards or backwards by a dialing rod to adjust the numbers and return to zero. When the number of digits is adjusted more or the digits are required to be reset to zero frequently, the dialing rod has more pushing times, and is troublesome to operate and easy to make mistakes. When the existing automatic numbering machine performs number zero resetting operation, a plastic pen or a dialing rod carried by the automatic numbering machine is required to be used for zero resetting, and the dialing rod is stored separately and is easy to lose. In addition, when the number seal on the number rotating wheel is made of rubber, the number seal is easy to damage when the number seal is reset to zero by using the dialing rod for too many times.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model aims to provide a return to zero automatic numbering machine, including the fluting shell, the knob of returning to zero, knob fluting earth axle, interior convex jump ring character wheel, return to zero spring etc. the outer circumference linear distribution inner groovy of knob fluting earth axle, the locating piece that returns to zero in the spring hole of returning to zero withstands the inner groovy, return to zero the spring top withstands the recess in interior convex jump ring character wheel connecting hole, the groove position corresponds the position of the zero-bit digit of interior convex jump ring character wheel, the utility model discloses when needs return to zero the adjustment, because return to zero the spring top and satisfy and withhold the zero-bit digit that interior convex jump ring character wheel corresponds interior convex jump ring character wheel, the characteristic of one-way intermittent motion mechanism rotates rotatory return to zero knob a week along same direction, can easily return to zero, need not to use one of dial rod and promote the number runner, be difficult for ma.

In order to achieve the above purpose, the technical scheme of the utility model is that: the zeroing automatic numbering machine comprises a handball, a snap spring, a handle tube spring, a slotted shell, a handle frame, a switch rivet, a comb spring, an ink box, a front cover, a movable claw frame, a splayed cover, a rear cover, a cylindrical pin, a thick buckling claw, a thin buckling claw, a zeroing knob, a knob slotted ground shaft, a coupling wheel, a triple wheel, a five-coupling wheel, a round gasket, an inward convex snap spring character wheel, a zeroing spring, a bottom plate, a movable claw big tooth and an ink box frame, wherein the handle tube is installed at the upper end of the U-shaped slotted shell with a downward opening, and a tube spring is installed in a counter bore at the upper end of a through hole in the handle; the upper end of the handle frame with the downward opening is provided with a connecting handle which is fixed into a whole by a switch and a switch rivet, the connecting handle penetrates through a through hole in the handle pipe from the U-shaped opening of the slotted shell from bottom to top and then penetrates through a hole of the handle pipe spring and then extends out of the upper end of the handle pipe spring, the clamp spring is arranged in a clamp spring groove at the lower end of the thread at the top of the connecting handle, the handle pipe spring is pressed and positioned, and the handball is screwed into the thread at the top of the connecting handle and connected;

after the cylindrical pin is connected with the through holes at one ends of the thick buckling claws and the thin buckling claws, two ends of the cylindrical pin are respectively connected with holes on two side walls of the handle frame;

the connecting wheel, the triple wheel, the quintuplet wheel, the plurality of inner convex snap spring character wheels and the round gasket are embedded into an open slot of the handle frame, the round gasket is arranged between the inner convex snap spring character wheels, the knob slotting ground shaft is arranged along a through hole on the side wall of the open slot of the handle frame and is connected with the connecting wheel, the triple wheel, the quintuplet wheel and the round gasket through the through hole, the other end of the knob slotting ground shaft is simultaneously arranged into a through hole on the side wall of the other end of the open slot of the handle frame, a screw hole is arranged in one side of the knob slotting ground shaft, the screw hole is connected with a return-to-zero knob, an inner groove is linearly distributed on the outer circumference of the grooved ground shaft of the knob, a return-to-zero positioning block in a return-to-zero spring hole props against the inner groove, the top of the return-to-zero spring elastically props against a groove in a connecting hole of the inward convex clamp spring character wheel, the position of the groove corresponds to the position of a zero digit of the inward convex clamp spring character wheel, after the mounted components are arranged in the slotted shell, the slotted earth axis of the knob is connected with the slots at the two sides of the slotted shell and can move;

the two supports at the upper end of the front cover are respectively connected with a movable claw frame, the upper end of the movable claw frame is connected with a movable claw, two ends of the movable claw are respectively connected with a splayed shape, the other end of the splayed shape is respectively connected with two side walls of the handle frame, and the front cover and one side surface of the slotted shell are fixed by screws;

the lower end of the rear cover is connected with a movable claw large tooth, two supports at one end of the other end of the rear cover are respectively fixed with a slotted shell screw, holes of the two supports at the other end of the movable claw large tooth are sleeved with a knob slotted ground shaft, movable claws of the rear movable claw large tooth are installed to respectively support an inward convex snap spring of an inward convex snap spring character wheel, when a handball pushes a handle frame to move downwards on the slotted shell, the connecting position of the rear cover and the movable claw large tooth can be turned over angularly, the movable claw large tooth is provided with a plurality of movable claws, and the movable claw of the movable claw large tooth moves a single-digit convex snap spring character wheel to rotate by one digital angular position every time the handball presses the handball the time;

the ink box is arranged in an ink box frame, and the ink box frame is connected with the movable claw frame in an elastic clamp type;

the comb spring is fixedly connected with one side surface of the handle frame, the number of elastic claws of the comb spring corresponds to that of the inner convex snap spring character wheels, and each elastic claw elastically presses one inner convex snap spring character wheel;

the bottom plate is connected with the bottom end face of the slotted shell in a covering mode, an opening is formed in the middle of the bottom plate, and the regulation of the opening is larger than the width of an opening groove of the handle frame.

The method is characterized in that the pushing salient points of the movable claws on the circumference of the inward convex snap spring character wheel of the unit position, the ten positions and the hundred positions are different, the number of the pushing salient points is sequentially reduced in proportion, the height of each movable claw is gradually shortened from the inward convex snap spring character wheel of the unit position, and after the movable claw of the unit position pushes the inward convex snap spring character wheel of the unit position for one circle 0-9, the inward convex snap spring character wheel of the next unit position returns to zero, the movable claw of the ten position synchronously pushes the inward convex snap spring character wheel of the ten position for one character; when the tens movable claws push the tens inward convex snap spring character wheels for 0-9 circles and then return to zero after the next tens inward convex snap spring character wheels for 0-9 circles, the hundreds movable claws 301 synchronously push the hundreds inward convex snap spring character wheels for one character and the like.

The utility model has the advantages that: the utility model discloses when needs zero adjustment, because the zero spring top that returns satisfies to withstand the corresponding zero-bit digit of protruding jump ring character wheel in the correspondence, one-way intermittent motion mechanism's characteristic rotates rotatory knob a week that returns to zero along same direction, can easily return to zero, need not to use promotion number runner of stick one of dialing, is difficult for makeing mistakes.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of the slotted housing of FIG. 2;

FIG. 4 is a schematic view of the zero knob of FIG. 2;

FIG. 5 is a schematic view of the knob slotted ground shaft of FIG. 2;

FIG. 6 is a schematic view of an inwardly convex snap spring character wheel in the boss 2;

fig. 7 is a schematic view of the return-to-zero spring of fig. 2.

In the figure: the ink box comprises a handball 1, a clamp spring 2, a handle tube 3, a handle tube spring 4, a slotted shell 5, a handle frame 6, a connecting handle 61, a switch 7, a switch rivet 8, a comb spring 9, an ink box 10, a front cover 11, a movable claw 12, a movable claw frame 13, a splayed character 14, a rear cover 15, a cylindrical pin 16, a thick buckling claw 19, a thin buckling claw 20, a zero returning knob 21, a knob slotted ground shaft 22, a coupling wheel 23, a triple gear 24, a five-coupling wheel 25, a round gasket 26, an inward convex clamp spring character wheel 27, a zero returning spring 28, a bottom plate 29, a movable claw large tooth 30, a movable claw I301 and an ink box frame 31.

The specific embodiments,

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

As shown in fig. 1-2, the zeroing automatic numbering machine comprises a handball 1, a snap spring 2, a handle tube 3, a handle tube spring 4, a slotted shell 5, a handle frame 6, a switch 7, a switch rivet 8, a comb spring 9, an ink box 10, a front cover 11, a movable claw 12, a movable claw frame 13, a splayed shape 14, a rear cover 15, a cylindrical pin 16, a thick buckle claw 19, a thin buckle claw 20, a zeroing knob 21, a knob slotted ground shaft 22, a coupling wheel 23, a triple gear 24, a five-coupling wheel 25, a round gasket 26, an inward convex snap spring character wheel 27, a zeroing spring 28, a bottom plate 29, a movable claw large tooth 30 and an ink box frame 31, wherein the handle tube 3 is installed at the upper end of the U-shaped slotted shell 5 with a downward opening, and the handle tube spring 4 is installed in a counter bore at the upper end of a through hole in the; the upper end of a handle frame 6 with a downward opening is provided with a connecting handle 61 and is fixed into a whole by a switch 7 and a switch rivet 8, the connecting handle 61 penetrates through a through hole in a handle pipe 3 from the U-shaped opening of a slotted shell 5 from bottom to top and then penetrates through a hole of a handle pipe spring 4 and then extends out of the upper end of the handle pipe spring 4, the handle pipe spring 4 is arranged in a clamp spring groove at the lower end of a thread at the top of the connecting handle 61 in a loading mode and is pressed and positioned, and the handball 1 is screwed into the thread at the top of the connecting handle 61 and is; the elastic thrust force which enables the connecting handle 61 and the mounting handle tube 3 to continuously keep an outward recovery state is beneficial to automatic reset during number printing;

after the cylindrical pin 16 is connected with the through holes at one ends of the thick buckling claws 19 and the thin buckling claws 20, two ends of the cylindrical pin 16 are respectively connected with the holes on two side walls of the handle frame 6;

the coupling wheel 23, the triple wheel 24, the quintuplet wheel 25, the plurality of inner convex snap-in character wheels 27 and the round gaskets 26 are embedded into an open slot of the handle frame 6, the round gaskets 26 are arranged among the inner convex snap-in character wheels 27, the knob slotted ground shaft 22 is arranged along a through hole on the side wall of the open slot of the handle frame 6 and is connected with holes of the coupling wheel 23, the triple wheel 24, the quintuplet wheel 25 and the round gaskets 26, the other end of the knob slotted ground shaft 22 is simultaneously arranged into a through hole on the side wall of the other end of the open slot of the handle frame 6, a screw hole is arranged in one side of the knob slotted ground shaft 22 and is connected with the zero return knob 21, inner grooves are linearly distributed on the outer circumference of the knob slotted ground shaft 22, a zero return positioning block in the hole of the zero return spring 28 abuts against the inner grooves, the top of the zero return spring 28 elastically abuts against a groove in a connecting hole of the inner convex, when zeroing adjustment is needed, because the top of the zeroing spring is used for propping against the zero digit of the inward convex snap spring character wheel corresponding to the inward convex snap spring character wheel, the unidirectional intermittent motion mechanism is characterized in that the zeroing knob is rotated and rotated for one circle along the same direction, so that easy zeroing can be realized, dial bars are not needed to be used, and the number rotating wheel is not easy to make mistakes one by one. After the above-mentioned components after installing are packed into the slotted outer casing 5, the knob slotted earth axis 22 is connected with the slot of both sides of the slotted outer casing 5 and can move;

the two supports at the upper end of the front cover 11 are respectively connected with a movable claw frame 13, the upper end of the movable claw frame 13 is connected with a movable claw 12, two ends of the movable claw 12 are respectively connected with splayed characters 14, the other end of each splayed character 14 is respectively connected with two side walls of the handle frame 6, and the front cover 11 and one side surface of the slotted shell 5 are fixed by screws; so as to achieve the function of synchronously driving the ink box frame 31 to turn outwards.

The lower end of the rear cover 15 is connected with a movable claw large tooth 30, two supports at one end of the other end of the rear cover 15 are respectively fixed with a slotted shell 5 through screws, holes of the two supports at the other end of the movable claw large tooth 30 are sleeved with a knob slotted ground shaft 22, a movable claw of the rear movable claw large tooth 30 is installed to respectively support an inner convex snap spring of an inner convex snap spring character wheel 27, when the handball 1 pushes the handle frame 6 to move downwards on the slotted shell 5, the connecting position of the rear cover 15 and the movable claw large tooth 30 can be turned over angularly, the movable claw large tooth 30 is provided with a plurality of movable claw one 301, when the handball 1 is pressed once, the movable claw one 301 of the movable claw large tooth 30 moves to rotate an angular position of one digit of the convex snap spring character wheels 27, and the digit increasing function during printing is completed.

The ink box 10 is arranged in an ink box frame 31, and the ink box frame 31 is connected with the movable claw frame 13 in an elastic clamp type; in a conventional state, the ink box 10 is kept in an inking state by adhering to the inward convex snap spring character wheel 27, and in printing application, when the handball 1 is pushed downwards, the connected structure synchronously drives the movable claw frame 13 to drive the ink box frame 31 and the ink box 10 to turn outwards; after the number is printed, the handle tube spring 4 pushes the connecting handle 61 to drive the lower component to elastically move upwards, the connecting structure synchronously drives the movable claw frame 13 to drive the ink box frame 31 and the ink box 10 to restore inwards and cling to the inward convex snap spring character wheel 27 to keep an inking state, and the inking is synchronously carried out once every time the number is printed.

The comb springs 9 are fixedly connected with one side face of the handle frame 6, the number of the elastic claws of the comb springs 9 corresponds to the number of the inner convex clamp spring character wheels 27, each elastic claw elastically presses one inner convex clamp spring character wheel 27, the inner convex clamp spring character wheels 27 are favorably kept in a damping state all the time, and the inner convex clamp spring character wheels 27 are prevented from rotating accidentally.

The bottom plate 29 is connected with the bottom end face of the slotted shell 5 in a covering mode, an opening is formed in the middle of the bottom plate 29, the opening specification is larger than the width of an open slot of the handle frame 6, and number printing is conducted conveniently when the inward-protruding snap spring character wheel 27 can extend out of the open slot of the handle frame 6.

In practical application, the pushing salient points of the first moving claws 301 on the circumference of the inward convex snap-spring character wheel 27 in the unit position, the ten position and the hundred position are different, the number of the pushing salient points is sequentially reduced in proportion, and the height of each first moving claw 301 is equal to the height of the inward convex of the unit position

The clamp spring character wheel 27 begins to be gradually shortened, and after the first ones of the movable claws 301 push the first ones of the inward convex clamp spring character wheels 27 for 0-9 circles, and the next ones of the inward convex clamp spring character wheels 27 returns to zero, the first tens of movable claws 301 synchronously push the tens of inward convex clamp spring character wheels for one character; when the tens-digit first movable claws 301 push the tens-digit inward convex snap spring character wheels 27 for 0-9 circles and then return to zero after the next tens-digit inward convex snap spring character wheels 27 for 0-9 circles, the hundreds-digit first movable claws 301 synchronously push the hundreds-digit inward convex snap spring character wheels for one character, and so on.

In application, as shown in fig. 3 to 7, the other end of the knob grooved ground shaft 22 is simultaneously installed in a through hole on the side wall of the other end of the open groove of the handle frame 6, a screw hole is arranged in one side of the knob grooved ground shaft 22 and connected with the zero return knob 21, inner grooves are linearly distributed on the outer circumference of the knob grooved ground shaft 22, a zero return positioning block in a zero return spring 28 hole abuts against the inner grooves, the top of the zero return spring 28 elastically abuts against a groove in a connecting hole of the inner convex snap spring character wheel 27, the position of the groove corresponds to the position of the zero digit of the inner convex snap spring character wheel 27, and after the installed components are installed in the grooved shell 5, the knob grooved ground shaft 22 is connected with the grooves on the two sides of the grooved shell 5.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. The skilled person in this trade also understands, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, do not keeping away from the utility model discloses under the connection meter category prerequisite, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of the utility model discloses the within range. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. Automatic numbering machine returns to zero which characterized in that: the automatic handle tube forming machine comprises a handball (1), a clamp spring (2), a handle tube (3), a handle tube spring (4), a slotted shell (5), a handle frame (6), a switch (7), a switch rivet (8), a comb spring (9), an ink box (10), a front cover (11), a movable claw (12), a movable claw frame (13), a splayed structure (14), a rear cover (15), a cylindrical pin (16), a thick buckle claw (19), a thin buckle claw (20), a zero return knob (21), a knob slotted ground shaft (22), a coupling wheel (23), a triple gear (24), a five-coupling wheel (25), a round gasket (26), an inner convex clamp spring character wheel (27), a zero return spring (28), a bottom plate (29), a movable claw large tooth (30) and an ink box frame (31), wherein the handle tube (3) is installed at the upper end of the U-shaped slotted shell (5) with a downward opening, and the handle tube spring (4) is installed in a counter bore at the; the upper end of a handle frame (6) with a downward opening is provided with a connecting handle (61) and is fixed into a whole by a switch (7) and a switch rivet (8), the connecting handle (61) penetrates through a through hole in a handle pipe (3) from the lower part to the upper part from a U-shaped opening of a slotted shell (5) and then penetrates through a hole of a handle pipe spring (4) to extend out of the upper end of the handle pipe spring (4), the clamp spring (2) is arranged in a clamp spring groove at the lower end of a thread at the top of the connecting handle (61), the handle pipe spring (4) is pressed and positioned, and the handball (1) is screwed into the thread at the top of the connecting handle (61) and connected;

after the cylindrical pin (16) is connected with through holes at one ends of the thick buckling claws (19) and the thin buckling claws (20), two ends of the cylindrical pin (16) are respectively connected with holes on two side walls of the handle frame (6);

the connecting wheel (23), the triple wheel (24), the five-connecting wheel (25), the plurality of inner convex snap spring character wheels (27) and the round gaskets (26) are embedded into an open slot of the handle frame (6), the round gaskets (26) are arranged among the inner convex snap spring character wheels (27), the knob slotted ground shaft (22) is arranged along a through hole on the side wall of the open slot of the handle frame (6) and is connected with the connecting wheel (23), the triple wheel (24), the five-connecting wheel (25) and the round gaskets (26), the other end of the knob slotted ground shaft (22) is simultaneously arranged into a through hole on the side wall of the other end of the open slot of the handle frame (6), a screw hole is arranged in one side of the knob slotted ground shaft (22) and is connected with a return-to-zero knob (21), grooves are linearly distributed on the outer circumference of the knob slotted ground shaft (22), return-to-zero positioning blocks in the holes of the return-to-zero springs (28) are pressed against inner grooves, the tops of the snap springs (28) are elastically pressed against, the position of the groove corresponds to the position of zero digit of the inward convex snap spring character wheel (27), after the mounted components are arranged in the slotted shell (5), the slotted earth shaft (22) of the knob is connected with the grooves on two sides of the slotted shell (5) and can move;

the two supports at the upper end of the front cover (11) are respectively connected with a movable claw frame (13), the upper end of the movable claw frame (13) is connected with a movable claw (12), two ends of the movable claw (12) are respectively connected with splayed characters (14), the other end of each splayed character (14) is respectively connected with two side walls of the handle frame (6), and the front cover (11) and one side surface of the slotted shell (5) are fixed by screws;

the lower end of the rear cover (15) is connected with a movable claw large tooth (30), two supports at one end of the other end of the rear cover (15) are respectively fixed with a slotted shell (5) through screws, holes of the two supports at the other end of the movable claw large tooth (30) are sleeved with a knob slotted ground shaft (22), a movable claw of the rear movable claw large tooth (30) is installed to respectively support an inward convex snap spring of an inward convex snap spring character wheel (27), when a handball (1) pushes a handle frame (6) to move downwards in the slotted shell (5), the connecting position of the rear cover (15) and the movable claw large tooth (30) can be turned over in angle, the movable claw large tooth (30) is provided with a plurality of movable claws one (301), and when the handball (1) presses once, the movable claw one (301) of the movable claw large tooth (30) moves to the convex snap spring character wheel (27) with one digit number and rotates to the angle position;

the ink box (10) is arranged in an ink box frame (31), and the ink box frame (31) is connected with the movable claw frame (13) in an elastic clamp mode;

the comb spring (9) is fixedly connected with one side face of the handle frame (6), the number of elastic claws of the comb spring (9) corresponds to the number of the inner convex snap spring character wheels (27), and each elastic claw elastically presses one inner convex snap spring character wheel (27) respectively;

the bottom plate (29) is connected with the bottom end face of the slotted shell (5) in a covering mode, an opening is formed in the middle of the bottom plate (29), and the opening is specified to be larger than the width of an opening groove of the handle frame (6).

2. The return-to-zero automatic numbering machine according to claim 1, wherein: the pushing salient points of the first moving claws (301) on the circumferences of the first-place, the tenth-place and the hundred-place inward-protruding snap spring character wheels (27) are different, the number of the pushing salient points is sequentially reduced in proportion, the height of each first moving claw (301) is gradually shortened from the first-place inward-protruding snap spring character wheel (27), and after the first-place moving claw (301) pushes the first-place inward-protruding snap spring character wheel (27) for one turn for 0-9, the next inward-protruding snap spring character wheel (27) for one turn is zero, the first-place moving claw (301) synchronously pushes one character of the tenth-place inward-protruding snap spring character wheel; when the tens-digit movable claws (301) push the tens-digit inward convex snap spring character wheels (27) for 0-9 circles and then return to zero after the next tens-digit inward convex snap spring character wheels (27) for 0-9 circles, the hundreds-digit movable claws (301) synchronously push the hundreds-digit inward convex snap spring character wheels for one character, and so on.

3. The return-to-zero automatic numbering machine according to claim 1, wherein: the other end of the knob slotted ground shaft (22) is simultaneously installed in a through hole in the side wall of the other end of the open slot of the handle frame (6), a screw hole is formed in one side of the knob slotted ground shaft (22) and connected with a return-to-zero knob (21), inner grooves are linearly distributed in the outer circumference of the knob slotted ground shaft (22), return-to-zero positioning blocks in the return-to-zero spring (28) holes abut against the inner grooves, the tops of the return-to-zero springs (28) elastically abut against grooves in connecting holes of the inward convex snap spring character wheels (27), the positions of the grooves correspond to the positions of zero digits of the inward convex snap spring character wheels (27), and after the installed components are installed in the slotted shell (5), the knob slotted ground shaft (22) is connected with grooves in two sides of the slotted shell (5) and.

Images