CN210223839U - Keyboard balancing pole forming device - Google Patents
Keyboard balancing pole forming device Download PDFInfo
- Publication number
- CN210223839U CN210223839U CN201921032568.6U CN201921032568U CN210223839U CN 210223839 U CN210223839 U CN 210223839U CN 201921032568 U CN201921032568 U CN 201921032568U CN 210223839 U CN210223839 U CN 210223839U
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- forming
- fixedly connected
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- fixing rod
- mounting block
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- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 24
- 244000309464 bull Species 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 abstract description 25
- 239000000463 material Substances 0.000 abstract description 16
- 238000005452 bending Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 13
- 238000000465 moulding Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model discloses a keyboard balancing pole forming device belongs to keyboard balancing pole processing field, a keyboard balancing pole forming device, which comprises a bod, the equal fixedly connected with supporting leg in four corners of bottom of the body, the front of organism is provided with the controller, the top fixedly connected with fixed plate of organism. This scheme is carried on the shaping workspace and is reached after setting for length through conveyor through the chute feeder when the wire rod, through the mutually supporting of reciprocating motion device and pressure material sword, can push down the wire rod, mutually support through two first shaping swoves cuts off the wire rod and carry out preliminary shaping, two second shaping swoves through the below left and right sides carry out the setting of bending at last, accomplish the shaping work of keyboard balancing pole, moreover, the steam generator is simple in operation, and adopt a plurality of independent mechanism actions, each accomplishes mutually noninterfere alone, it is accurate stable to enable the motion, machining precision is high.
Description
Technical Field
The utility model relates to a keyboard balancing pole processing field, more specifically say, relate to a keyboard balancing pole forming device.
Background
Keyboards are currently the most common and primary input devices used to enter text, symbols, or numbers. Moreover, for example, consumer electronic products in contact with daily life or large processing equipment used in the industry, a key structure is required to be provided as an input device for operating the electronic products and the processing equipment.
Generally speaking, most of keys on the keyboard device are keys of square key caps, the length of a small part of keys such as blank keys (SPACE) and input keys (Enter) is greater than the width, the key surface is longer, when a user strikes the keyboard, fingers can not guarantee to strike the middle position of the key cap at each time, if the fingers strike the side, the key effect can be triggered only by applying larger pressure to the key cap, then a balance rod needs to be additionally arranged, the key cap can not incline and lift due to stress point difference, the two ends of the key cap reach the balance effect, and the user strikes any position of the key cap and can reach the effect of triggering the key.
The balance bar for the computer keyboard is approximately n-shaped at present and is formed by bending metal wires, although the structure is simpler, the requirements of four 90-degree folded angle parts and other length sizes and positions on the precision are very high, and the existing metal wire forming machine for machining the balance bar is 1, a multi-shaft CNC computer spring forming machine can form at one time, the precision is high, but the investment is huge, the production speed is low, and the efficiency is low. 2. The common iron wire forming machine has the defects of difficult die manufacturing, difficult precision guarantee and poor stability, so the forming device for the keyboard balancing pole is provided.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved
To the problem that exists among the prior art, the utility model aims to provide a keyboard balancing pole forming device possesses efficient, the high and advantage with low costs of machining precision, has solved current balancing pole machining efficiency low, the precision is low and with high costs problem.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides a keyboard balancing pole forming device, includes the organism, the equal fixedly connected with supporting leg in four corners of bottom of the body, the front of organism is provided with the controller, the top fixedly connected with fixed plate of organism, the front of fixed plate is provided with forming mechanism, forming mechanism includes circular work board, the back of circular work board and the front fixed connection of fixed plate, the positive centre of a circle department fixedly connected with shaping workspace of circular work board, the positive top of circular work board is provided with the pressure material sword that can up-and-down motion along vertical direction, the left and right sides of pressing the material sword all is provided with the first shaping sword that can slant reciprocating motion, the positive below of circular work board is provided with two second shaping swoves that can slant reciprocating motion, two the second shaping sword is symmetrical with two first shaping swoves respectively, press the material sword, The back surfaces of the two first forming cutters and the back surfaces of the two second forming cutters are respectively contacted with the front surface of the forming working area, the back surfaces of the pressing cutter, the back surfaces of the two first forming cutters and the back surfaces of the two second forming cutters are respectively provided with a reciprocating motion device, and a feeding groove is formed between the first forming cutter and the second forming cutter on the right side.
Preferably, five reciprocating motion device all includes the slide rail, every the back of slide rail respectively with the positive fixed connection of circular work board, every the equal sliding connection in inside of slide rail has the slider, every the equal fixedly connected with installation piece in front of slider, press material sword, two first shaping swoves and two second shaping swoves to set up respectively in the front of installation piece, circular work board lateral surface corresponds every slide rail and all is provided with the locating piece, every all be provided with power device on the locating piece, every one side that the installation piece is close to the locating piece all is seted up flutedly, the inside of recess all is provided with the roller bearing, power device passes through the roller bearing and is connected with the installation piece, every all be provided with return means on the installation piece.
Preferably, power device includes the cam, the back fixedly connected with bull stick of cam, the front of locating piece corresponds bull stick fixedly connected with bearing, the one end that the cam was kept away from to the bull stick runs through bearing and locating piece and the back that the fixed plate extends to the fixed plate in proper order, the back of fixed plate corresponds bull stick fixedly connected with driving motor, the front and the bull stick fixed connection of driving motor output shaft.
Preferably, the front side and the back side of the rolling shaft are fixedly connected with rotating shafts, the two ends, away from the rotating shafts, of the rotating shafts are fixedly connected with rotating seats, the two sides, away from the rotating seats, of the rotating seats are fixedly connected with the front side and the back side of the inner wall of the groove respectively, and the cam is in contact with the rolling shaft.
Preferably, the returning device comprises a first fixing rod and a second fixing rod, the back of the first fixing rod is fixedly connected with the front of the mounting block, one side of the positioning block, which is far away from the circular working plate, is fixedly connected with a supporting block, the back of the second fixing rod is fixedly connected with the front of the supporting block, a backspacing spring is arranged between the first fixing rod and the second fixing rod, two ends of the backspacing spring are fixedly connected with the first fixing rod and the second fixing rod respectively, and the backspacing spring is located above the mounting block.
Preferably, the swaging knife, the two first forming knives and the two second forming knives are fixedly connected with the mounting block through bolts respectively.
3. Advantageous effects
Compared with the prior art, the utility model has the advantages of:
(1) this scheme is carried the shaping workspace and is gone up and reach the settlement length back through the chute feeder when the wire rod through conveyor, through the mutually supporting of reciprocating motion device and pressure material sword, can push down the wire rod, cut off the wire rod and carry out preliminary shaping through mutually supporting of two first shaping swoves, two second shaping swoves through the below left and right sides carry out the final shaping of bending, accomplish the shaping work of keyboard balancing pole, moreover, the steam generator is simple in operation, high convenience and fastness, and adopt a plurality of independent mechanism actions, each accomplishes mutually noninterfere alone, it is accurate stable to enable the motion, high machining precision, after accomplishing a keyboard balancing pole, the cooperation of the compound telecontrol equipment of accessible can carry out next, so reciprocal, the degree of automation is high, high work efficiency.
(2) Through the mutual matching of the power device, the rolling shaft and the return device, the sliding block on the back of the mounting block can be driven to reciprocate in the sliding rail, so that the pressing knife, the two first forming knives and the two second forming knives are driven to reciprocate, wires conveyed to a forming working area are bent and shaped, and the forming work of the keyboard balancing pole is completed.
(3) Through switching on driving motor, can drive the bull stick and rotate, and then drive the cam and rotate, when the arch of cam was not with the roller bearing contact, can exert extruded power to the direction of installation piece to the shaping workspace, and then drive installation piece and press the material sword, two first shaping swoves and two second shaping swoves to the direction motion of shaping workspace and carry out bending forming work.
(4) When the convex part of the cam is not contacted with the roller, the installation block can be driven to reset through the mutual matching of the backspacing spring, the first fixed rod and the second fixed rod.
(5) Through will pressing material sword, two first molding knives and two second molding knives and adopt the mode of bolt fastening through bolt and installation piece respectively, can conveniently press the installation and the dismantlement of material sword, two first molding knives and two second molding knives, the change of the cutter of being convenient for improves the machining precision, and the shaping of different style products can be accomplished to the adjustment mutual position, cost greatly reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the reciprocating device of FIG. 1 according to the present invention;
FIG. 3 is a partial cross-sectional side view of the present invention shown in FIG. 1;
fig. 4 is an enlarged view of a portion a in fig. 3 according to the present invention.
The reference numbers in the figures illustrate:
1. a body; 2. a controller; 3. a fixing plate; 4. a molding mechanism; 41. a circular work plate; 42. forming a working area; 43. a material pressing knife; 44. a first forming knife; 45. a second forming knife; 46. a reciprocating device; 5. a slide rail; 6. a slider; 7. mounting blocks; 8. positioning blocks; 9. a power plant; 91. a cam; 92. a rotating rod; 93. a bearing; 94. a drive motor; 10. a groove; 11. a roller; 12. a return device; 121. a first fixing lever; 122. a second fixing bar; 123. a retraction spring; 13. a rotating shaft; 14. a rotating seat; 15. a feeding groove.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, a keyboard balance bar forming device comprises a machine body 1, wherein four corners of the bottom of the machine body 1 are fixedly connected with support legs, a controller 2 is arranged on the front surface of the machine body 1, a fixing plate 3 is fixedly connected to the top of the machine body 1, a forming mechanism 4 is arranged on the front surface of the fixing plate 3, the forming mechanism 4 comprises a circular working plate 41, the back surface of the circular working plate 41 is fixedly connected with the front surface of the fixing plate 3, a forming working area 42 is fixedly connected to the center of the front surface of the circular working plate 41, a pressing knife 43 capable of moving up and down is arranged above the front surface of the circular working plate 41 along the vertical direction, first forming knives 44 capable of moving up and down are arranged on the left and right sides of the pressing knife 43, two second forming knives 45 capable of moving up and down are arranged below the front surface of the circular working plate 41, the two second forming knives 45 are, the back surfaces of the material pressing knife 43, the two first forming knives 44 and the two second forming knives 45 are respectively contacted with the front surface of the forming working area 42, the back surfaces of the material pressing knife 43, the two first forming knives 44 and the two second forming knives 45 are respectively provided with a reciprocating device 46, a feeding groove 15 is arranged between the first forming knife 44 on the right side and the second forming knife 45, when a wire is conveyed to the forming working area 42 through the feeding groove 15 by a conveying device and reaches a set length, the wire can be pressed by the mutual matching of the reciprocating device 46 and the material pressing knife 43, the wire is cut off and preliminarily formed by the mutual matching of the two first forming knives 44, the final bending and shaping are carried out by the two second forming knives 45 on the left side and the right side below, the forming work of the keyboard balancing rod is completed, the operation is simple, convenient and rapid, a plurality of independent mechanism actions are adopted, and each independently and do not interfere with each other, the keyboard balancing pole has the advantages that the motion is accurate and stable, the machining precision is high, after a keyboard balancing pole is completed, next action can be carried out through the matching of the reciprocating motion device 46, the reciprocating action is carried out, the automation degree is high, and the working efficiency is high.
Further, the five reciprocating devices 46 each include a slide rail 5, the back of each slide rail 5 is fixedly connected with the front of the circular working plate 41, a slide block 6 is slidably connected inside each slide rail 5, the front of each slide block 6 is fixedly connected with the mounting block 7, the pressing knife 43, the two first forming knives 44 and the two second forming knives 45 are respectively arranged on the front of the mounting block 7, the outer side of the circular working plate 41 is provided with a positioning block 8 corresponding to each slide rail 5, each positioning block 8 is provided with a power device 9, one side of each mounting block 7 close to the positioning block 8 is provided with a groove 10, the inside of the groove 10 is provided with a roller 11, the power device 9 is connected with the mounting block 7 through the roller 11, each mounting block 7 is provided with a return device 12, and the slide block 6 on the back of the mounting block 7 can be driven to reciprocate in the slide rail 5 through the mutual matching of the power device 9, the roller 11 and the return device 12, and then the pressing knife 43, the two first forming knives 44 and the two second forming knives 45 are driven to reciprocate, and the wire rods conveyed to the forming working area 42 are bent and shaped, so that the forming work of the keyboard balancing pole is completed.
Further, the power device 9 includes a cam 91, a rotating rod 92 is fixedly connected to the back of the cam 91, a bearing 93 is fixedly connected to the front of the positioning block 8 corresponding to the rotating rod 92, one end of the rotating rod 92 far away from the cam 91 sequentially penetrates through the bearing 93, the positioning block 8 and the fixing plate 3 to extend to the back of the fixing plate 3, a driving motor 94 is fixedly connected to the back of the fixing plate 3 corresponding to the rotating rod 92, the model of the driving motor 94 is Y160M-4, the driving motor 94 is electrically connected to the controller 2 through a conducting wire, the front of the output shaft of the driving motor 94 is fixedly connected to the rotating rod 92, the rotating rod 92 is fixedly connected to the inner ring of the bearing 93, the front and the back of the roller 11 are fixedly connected to rotating shafts 13, one ends of the two rotating shafts 13, which are far away, are fixedly connected to rotating seats 14, one sides of the two rotating seats 14, which, when the protrusion of the cam 91 is not in contact with the roller 11, an extruding force can be applied to the mounting block 7 in the direction of the forming work area 42, and the mounting block 7, the pressing knife 43, the two first forming knives 44, and the two second forming knives 45 are driven to move in the direction of the forming work area 42 to perform bending forming work.
Further, the returning device 12 includes a first fixing rod 121 and a second fixing rod 122, the back of the first fixing rod 121 is fixedly connected to the front of the mounting block 7, a supporting block is fixedly connected to one side of the positioning block 8 away from the circular working plate 41, the back of the second fixing rod 122 is fixedly connected to the front of the supporting block, a retraction spring 123 is disposed between the first fixing rod 121 and the second fixing rod 122, two ends of the retraction spring 123 are respectively fixedly connected to the first fixing rod 121 and the second fixing rod 122, the retraction spring 123 is located above the mounting block 7, and when the protruding portion of the cam 91 is not in contact with the roller 11, the mounting block 7 can be driven to be reset by the cooperation of the retraction spring 123, the first fixing rod 121 and the second fixing rod 122.
Further, press material sword 43, two first molding sword 44 and two second molding sword 45 respectively through bolt and installation piece 7 fixed connection, through pressing material sword 43, two first molding sword 44 and two second molding sword 45 respectively through bolt and installation piece 7 adoption bolt fastening's mode, can conveniently press the installation and the dismantlement of material sword 43, two first molding sword 44 and two second molding sword 45, the change of the cutter of being convenient for improves the machining precision, and the shaping of different style products can be accomplished in the adjustment mutual position, cost greatly reduced.
The working principle is as follows: when the wire is conveyed to the forming working area 42 through the feeding groove 15 by the conveying device and reaches a set length, the driving motor 94 is electrified to drive the rotating rod 92 to rotate so as to drive the cam 91 to rotate, when the bulge of the cam 91 is not contacted with the roller 11, an extrusion force can be applied to the mounting block 7 in the direction of the forming working area 42 so as to drive the mounting block 7, the pressing knife 43, the two first forming knives 44 and the two second forming knives 45 to move in the direction of the forming working area 42 to perform bending forming working pressing knife 43, at the moment, the pressing knife 43 can press the wire, the two first forming knives 44 cut off the wire and perform primary forming, the two second forming knives 45 on the left side and the right side below perform final bending forming, the forming work of the keyboard balancing rod is completed, a plurality of independent mechanism actions are adopted, each independent mechanism action does not interfere with each other, and the accurate and stable movement can be realized, The processing precision is high, meanwhile, the retraction spring 123 in the return device 12 extends and deforms, when the protruding portion of the cam 91 is not in contact with the roller 11, the roller 11 has no extrusion force, the retraction spring 123 contracts and resets, the mounting block 7 is driven to reset to perform the forming work of the next keyboard balancing pole, the operation is repeated in this way, the automation degree is high, the working efficiency is high, the pressing knife 43, the two first forming knives 44 and the two second forming knives 45 can be conveniently mounted and dismounted by respectively adopting a bolt fixing mode through bolts and the mounting block 7, the replacement of the knives is facilitated, the processing precision is improved, the forming of different types of products can be completed by adjusting the mutual positions, and the cost is greatly reduced.
The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (6)
1. The utility model provides a keyboard balancing pole forming device, includes organism (1), its characterized in that: the four corners of the bottom of the machine body (1) are fixedly connected with supporting legs, the front of the machine body (1) is provided with a controller (2), the top of the machine body (1) is fixedly connected with a fixing plate (3), the front of the fixing plate (3) is provided with a forming mechanism (4), the forming mechanism (4) comprises a circular working plate (41), the back of the circular working plate (41) is fixedly connected with the front of the fixing plate (3), the center of the front of the circular working plate (41) is fixedly connected with a forming working area (42), a pressing cutter (43) capable of moving up and down is arranged above the front of the circular working plate (41) along the vertical direction, the left side and the right side of the pressing cutter (43) are both provided with a first forming cutter (44) capable of moving obliquely and back, and forth below the front of the circular working plate (41) are provided with two second forming cutters (45) capable of moving obliquely and back and forth, the two second forming knives (45) are respectively symmetrical to the two first forming knives (44), the back surfaces of the pressing knife (43), the two first forming knives (44) and the two second forming knives (45) are respectively contacted with the front surface of the forming working area (42), the back surfaces of the pressing knife (43), the two first forming knives (44) and the two second forming knives (45) are respectively provided with a reciprocating device (46), and a feeding groove (15) is formed between the first forming knife (44) and the second forming knife (45) on the right side.
2. The keyboard balance bar forming device of claim 1, wherein: the five reciprocating devices (46) respectively comprise slide rails (5), the back of each slide rail (5) is respectively fixedly connected with the front of a circular working plate (41), a slide block (6) is slidably connected inside each slide rail (5), the front of each slide block (6) is respectively fixedly connected with a mounting block (7), a pressing cutter (43), two first forming cutters (44) and two second forming cutters (45) are respectively arranged on the front of the mounting block (7), a positioning block (8) is arranged on the outer side surface of the circular working plate (41) corresponding to each slide rail (5), a power device (9) is arranged on each positioning block (8), a groove (10) is formed in one side, close to the positioning block (8), of each mounting block (7), a rolling shaft (11) is arranged inside each groove (10), and the power device (9) is connected with the mounting block (7) through the rolling shaft (11), each mounting block (7) is provided with a return device (12).
3. The keyboard balance bar forming device of claim 2, wherein: power device (9) include cam (91), back fixedly connected with bull stick (92) of cam (91), the front of locating piece (8) corresponds bull stick (92) fixedly connected with bearing (93), the one end that cam (91) were kept away from in bull stick (92) runs through bearing (93) and locating piece (8) and fixed plate (3) in proper order and extends to the back of fixed plate (3), the back of fixed plate (3) corresponds bull stick (92) fixedly connected with driving motor (94), the front and bull stick (92) fixed connection of driving motor (94) output shaft.
4. The keyboard balance bar forming device of claim 3, wherein: the front and the back of roller bearing (11) are equal fixedly connected with pivot (13), two the equal fixedly connected with of one end that pivot (13) deviates from mutually rotates seat (14), two rotate one side that seat (14) deviate from mutually respectively with the front and the back fixed connection of recess (10) inner wall, cam (91) and roller bearing (11) contact.
5. The keyboard balance bar forming device of claim 2, wherein: the return device (12) comprises a first fixing rod (121) and a second fixing rod (122), the back of the first fixing rod (121) is fixedly connected with the front of the mounting block (7), one side, far away from the circular working plate (41), of the positioning block (8) is fixedly connected with a supporting block, the back of the second fixing rod (122) is fixedly connected with the front of the supporting block, a retraction spring (123) is arranged between the first fixing rod (121) and the second fixing rod (122), two ends of the retraction spring (123) are fixedly connected with the first fixing rod (121) and the second fixing rod (122) respectively, and the retraction spring (123) is located above the mounting block (7).
6. The keyboard balance bar forming device of claim 1, wherein: the pressing knife (43), the two first forming knives (44) and the two second forming knives (45) are fixedly connected with the mounting block (7) through bolts respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201921032568.6U CN210223839U (en) | 2019-07-04 | 2019-07-04 | Keyboard balancing pole forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201921032568.6U CN210223839U (en) | 2019-07-04 | 2019-07-04 | Keyboard balancing pole forming device |
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CN210223839U true CN210223839U (en) | 2020-03-31 |
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Application Number | Title | Priority Date | Filing Date |
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CN201921032568.6U Expired - Fee Related CN210223839U (en) | 2019-07-04 | 2019-07-04 | Keyboard balancing pole forming device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114464478A (en) * | 2022-02-17 | 2022-05-10 | 东莞市万将机电设备有限公司 | Turntable device in automatic assembling machine for microswitch |
-
2019
- 2019-07-04 CN CN201921032568.6U patent/CN210223839U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114464478A (en) * | 2022-02-17 | 2022-05-10 | 东莞市万将机电设备有限公司 | Turntable device in automatic assembling machine for microswitch |
CN114464478B (en) * | 2022-02-17 | 2024-04-09 | 东莞市万将机电设备有限公司 | Turntable device in automatic microswitch assembling machine |
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Granted publication date: 20200331 |