A torque tightening device for a capacitive pen
By combining a sliding lifting assembly, a floating buffer assembly, and a torque tightening assembly, and using a servo motor and torque sensor to precisely control the tightening force, the problem of difficult-to-control tightening force during the assembly of a capacitive pen is solved, improving assembly stability and reducing the failure rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WORLD BEATER PRECISION MFR WUXI
- Filing Date
- 2025-08-14
- Publication Date
- 2026-08-04
AI Technical Summary
In the current assembly process of capacitive pens, manual tightening is inefficient and cannot accurately control the tightening force, resulting in stripped threads and component deformation, which increases maintenance costs and product failure rate.
It adopts a combination of sliding lifting component and floating buffer component with torque tightening component, and uses servo motor and torque sensor to precisely control the tightening force, and uses magnetic drive component and rotary negative pressure adsorption component to achieve quick disassembly and stable transmission of rotational power.
This technology improves the stability and pass rate of capacitive pen assembly, reduces maintenance costs and product failure rate, protects the integrity of precision structures, and facilitates the quick replacement and tightening of different models of parts.
Smart Images
Figure CN224587426U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of torque tightening devices, and in particular to a torque tightening device for a capacitive pen. Background Technology
[0002] With the rapid development of touch technology, capacitive pens, as a precise input tool for controlling touchscreens, have been widely used in various electronic devices such as smartphones, tablets, and graphics tablets, becoming an indispensable accessory for drawing, writing, and design. The stability of the connection between the pen body and the tip, cap, or other detachable parts directly affects the user experience and lifespan of the capacitive pen.
[0003] Currently, most capacitive pens use threaded connections, requiring manual tightening with a screwdriver during assembly. However, manual tightening is inefficient and cannot effectively control the tightening torque, leading to issues such as thread stripping and component deformation when tightened too much. This is especially problematic for delicate products like capacitive pens, which are often made of lightweight alloys or engineering plastics. Over-tightening can easily cause irreversible structural damage, increasing maintenance costs and product failure rates. Therefore, it is necessary to develop a torque tightening device that can precisely control the tightening force to solve this problem. Utility Model Content
[0004] The purpose of this invention is to provide a torque tightening device for capacitive pens, which has the advantages of simple structure and precise control of tightening torque.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a torque tightening device for a capacitive pen, comprising a base; a material picking mounting seat is movably connected to the base based on a sliding lifting component; at least one set of torque tightening components is movably connected to the material picking mounting seat along the vertical direction based on a floating buffer component; the tightening end of the torque tightening component is detachably provided with a capacitive pen tightening head for adsorbing capacitive pen parts.
[0006] The present invention is further configured such that: the sliding lifting assembly includes a horizontal lead screw slide fixedly connected to the base along the horizontal direction and a vertical mounting base fixedly connected to the sliding end of the horizontal lead screw slide; a vertical lead screw lifting slide is fixedly connected to the vertical mounting base along the vertical direction; and the material picking mounting base is fixedly connected to the sliding end of the vertical lead screw lifting slide along the vertical direction.
[0007] The present invention is further configured such that: the floating buffer assembly includes a vertical slide rail fixedly connected to the material picking mounting base along the vertical direction and a tightening seat slidably connected to the vertical slide rail along the vertical direction for installing the torque tightening assembly; a buffer seat arranged along the horizontal direction is fixedly connected to the top of the material picking mounting base; at least one floating rod is fixedly connected to the top of the tightening seat along the vertical direction; a floating hole that cooperates with the floating rod is opened on the buffer seat; a buffer spring is sleeved and connected to the floating rod; and a limit block is fixedly connected to the top of the floating rod away from the tightening seat.
[0008] The present invention is further configured such that: the torque tightening assembly includes a torque sensor fixedly connected to the tightening seat; a tightening motor fixedly connected to the tightening seat and connected to the input end of the torque sensor via a coupling; a tightening mounting rod rotatably connected to the tightening seat and connected to the output end of the torque sensor via a coupling; the capacitive pen tightening head is detachably and fixedly connected to the tightening mounting rod via a magnetic drive assembly; and the capacitive pen tightening head is provided with a rotating negative pressure adsorption assembly for adsorbing capacitive pen parts.
[0009] The present invention is further configured such that: the magnetic suction transmission assembly includes a magnetic suction hole opened at the bottom of the tightening mounting rod and a magnetic suction rod protruding and fixedly connected to the top of the capacitive pen tightening head; a magnetic suction block for attracting the magnetic suction rod is fixedly connected in the magnetic suction hole; at least two positioning transmission grooves are evenly opened in the magnetic suction hole along the circumferential direction; and a plurality of protruding positioning transmission blocks are evenly provided on the magnetic suction rod along the circumferential direction for cooperating with the top positioning transmission groove.
[0010] The present invention is further configured such that: the rotating negative pressure adsorption assembly includes a receiving groove formed inside the capacitive pen tightening head for accommodating capacitive pen parts; a rotating groove is coaxially formed on the side wall of the capacitive pen tightening head; a plurality of negative pressure adsorption grooves communicating with the receiving groove are uniformly formed along the circumferential direction in the rotating groove; a negative pressure adsorption ring is rotatably connected coaxially in the receiving groove; a plurality of negative pressure adsorption holes are uniformly formed along the circumferential direction on the inner wall of the negative pressure adsorption ring; a negative pressure adsorption tube communicating with the plurality of negative pressure adsorption holes is fixedly connected to the outer wall of the negative pressure adsorption ring; and a negative pressure pump is externally connected to the negative pressure adsorption tube.
[0011] The present invention is further configured such that: the tightening motor is a servo motor, and the tightening motor is coupled to the torque sensor.
[0012] The present invention is further configured such that two sets of the torque tightening assembly are arranged in parallel.
[0013] In summary, this utility model has the following beneficial effects:
[0014] 1. By setting a material-picking mounting seat on the base based on a sliding lifting component, and setting a torque tightening component on the material-picking mounting seat based on a floating buffer component, the sliding lifting component can drive the material-picking mounting seat and the torque tightening component to achieve precise horizontal and vertical movement through the cooperation of the horizontal screw slide and the vertical screw lifting slide, meeting the assembly needs of different positions. At the same time, it can also realize the automatic picking of capacitive pen parts. The floating buffer component provides buffer for the torque tightening component during the tightening process through the elastic action of the buffer spring, avoiding damage to the parts caused by rigid contact, and further protecting the precision structure of the capacitive pen. The torque tightening component drives the tightening mounting rod to rotate through the tightening motor, which in turn drives the tightening head of the capacitive pen to rotate. When the torque sensor detects that the tightening torque reaches the preset value, it will immediately feed back a signal and control the tightening motor to stop working, realizing precise control of the tightening force, significantly improving the stability and pass rate of capacitive pen assembly, and reducing maintenance costs and product failure rate.
[0015] 2. The torque tightening assembly, through the setting of a capacitive pen tightening head, is detachably connected to the mounting rod based on a magnetic drive assembly. The magnetic drive assembly achieves quick disassembly and installation of the capacitive pen tightening head and the tightening mounting rod through the attraction of a magnetic block to the magnetic rod. The engagement of the positioning drive groove and the positioning drive block ensures stable transmission of rotational power, facilitating the replacement of the corresponding tightening head for different capacitive pen parts. Simultaneously, a rotating negative pressure adsorption assembly is set inside the capacitive pen tightening head. This assembly ensures that the capacitive pen parts rotate synchronously with the tightening head while in the adsorbed state, ensuring the continuity and stability of the tightening process. When adsorbing parts for a capacitive pen, a negative pressure pump provides negative pressure to the negative pressure adsorption ring through a negative pressure adsorption tube. The negative pressure adsorption holes on the inner wall of the negative pressure adsorption ring generate adsorption force, thereby adsorbing the pen parts into the receiving groove. At the same time, as the pen tightening head rotates, the negative pressure adsorption ring remains stationary. The negative pressure adsorption grooves, which are evenly distributed along the circumference in the rotating groove on the side wall of the pen tightening head, are always connected to the negative pressure adsorption holes on the inner wall of the negative pressure adsorption ring, ensuring the continuity of negative pressure adsorption. This allows the pen tightening head to both pick up the parts and tighten them simultaneously. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment;
[0017] Figure 2 yes Figure 1 Enlarged schematic diagram of part A;
[0018] Figure 3 yes Figure 1 Enlarged diagram of part B;
[0019] Figure 4This is a cross-sectional view of the rotating negative pressure adsorption assembly in this embodiment.
[0020] Reference numerals: 1. Base; 2. Sliding lifting assembly; 21. Horizontal screw slide; 22. Vertical mounting base; 23. Vertical screw lifting slide; 3. Material picking mounting base; 4. Floating buffer assembly; 41. Vertical slide rail; 42. Tightening seat; 43. Buffer seat; 44. Floating rod; 45. Buffer spring; 46. Limit block; 5. Torque tightening assembly; 51. Torque sensor; 52. Coupling; 53. Tightening power supply 54. Tightening mounting rod; 55. Magnetic drive assembly; 551. Magnetic hole; 552. Magnetic rod; 553. Magnetic block; 554. Positioning drive groove; 555. Positioning drive block; 56. Rotating negative pressure adsorption assembly; 561. Receiving groove; 562. Rotating groove; 563. Negative pressure adsorption groove; 564. Negative pressure adsorption ring; 565. Negative pressure adsorption hole; 566. Negative pressure adsorption tube; 6. Capacitive pen tightening head. Detailed Implementation
[0021] The present invention will be further described in detail below with reference to the accompanying drawings.
[0022] Example:
[0023] refer to Figures 1 to 4 A torque tightening device for a capacitive pen includes a base 1. A material-picking mounting seat 3 is movably connected to the base 1 based on a sliding lifting assembly 2. At least one set of torque tightening assemblies 5 is movably connected to the material-picking mounting seat 3 along the vertical direction based on a floating buffer assembly 4. A capacitive pen tightening head 6 for adsorbing capacitive pen parts is detachably provided at the tightening end of the torque tightening assembly 5. In this embodiment, two sets of torque tightening assemblies 5 are arranged side by side to improve tightening efficiency.
[0024] refer to Figure 1 Specifically, the sliding lifting assembly 2 includes a horizontal lead screw slide 21 fixedly connected to the base 1 along the horizontal direction and a vertical mounting base 22 fixedly connected to the sliding end of the horizontal lead screw slide 21. A vertical lead screw lifting slide 23 is fixedly connected to the vertical mounting base 22 along the vertical direction. A material picking mounting base 3 is fixedly connected to the sliding end of the vertical lead screw lifting slide 23 along the vertical direction. Through the cooperation of the horizontal lead screw slide 21 and the vertical lead screw lifting slide 23, the sliding lifting assembly 2 can drive the material picking mounting base 3 and the torque tightening assembly 5 to achieve precise horizontal and vertical movement, meet the assembly requirements of different positions, and also realize the automatic picking of capacitive pen parts.
[0025] refer to Figure 1 and Figure 2Specifically, the floating buffer assembly 4 includes a vertical slide rail 41 fixedly connected to the material picking mounting base 3 along the vertical direction and a tightening seat 42 slidably connected to the vertical slide rail 41 for mounting the torque tightening assembly 5. A buffer seat 43 arranged in the horizontal direction is fixedly connected to the top of the material picking mounting base 3. At least one floating rod 44 is fixedly connected to the top of the tightening seat 42 along the vertical direction. The buffer seat 43 has a floating hole that cooperates with the floating rod 44. A buffer spring 45 is sleeved and connected to the floating rod 44. A limit block 46 is fixedly connected to the top of the floating rod 44 away from the tightening seat 42. The floating buffer assembly 4 provides buffer for the torque tightening assembly 5 during the tightening process through the elastic action of the buffer spring 45, avoiding damage to the parts caused by rigid contact and further protecting the precision structure of the capacitive pen.
[0026] refer to Figure 3 and Figure 4 Specifically, the torque tightening assembly 5 includes a torque sensor 51 fixedly connected within the tightening seat 42. A tightening motor 53, connected to the input end of the torque sensor 51 via a coupling 52, is fixedly connected to the tightening seat 42. A tightening mounting rod 54, connected to the output end of the torque sensor 51 via a coupling 52, is also rotatably connected to the tightening seat 42. The torque tightening assembly 5 drives the tightening mounting rod 54 to rotate via the tightening motor 53, thereby driving the capacitive pen tightening head 6 to rotate. When the torque sensor 51 detects that the tightening torque reaches a preset value, it immediately feeds back a signal and controls the tightening motor 53 to stop working, achieving precise control of the tightening force. This significantly improves the stability and pass rate of capacitive pen assembly, reduces maintenance costs and product failure rate. The capacitive pen tightening head 6 is detachably and fixedly connected to the tightening mounting rod 54 via a magnetic drive assembly 55. The magnetic drive assembly 55 includes a magnetic hole 551 at the bottom of the tightening mounting rod 54 and a magnetic rod 552 protruding and fixedly connected to the top of the capacitive pen tightening head 6. A magnetic block 553 for attracting the magnetic rod 552 is fixedly connected in the magnetic hole 551. At least two positioning drive grooves 554 are evenly opened in the magnetic hole 551 along the circumferential direction. Several protruding positioning drive blocks 555 are evenly arranged in the circumferential direction on the magnetic rod 552 for cooperating with the positioning drive grooves 554. The magnetic drive assembly 55 realizes the quick disassembly and installation of the capacitive pen tightening head 6 and the tightening mounting rod 54 through the attraction of the magnetic rod 552 by the magnetic block 553. The engagement of the positioning drive groove 554 and the positioning drive block 555 ensures the stable transmission of rotational power, thereby facilitating the replacement of the corresponding tightening head according to different models of capacitive pen parts. In this embodiment, the tightening motor 53 is a servo motor. The tightening motor 53 is coupled to the torque sensor 51. When the torque sensor 51 senses that the torque reaches the predetermined torque, it controls the tightening motor 53 to stop rotating, so as to avoid excessive torque and damage to the capacitive pen.
[0027] refer to Figure 3 and Figure 4 Specifically, a rotating negative pressure adsorption assembly 56 for adsorbing capacitive pen parts is provided inside the capacitive pen tightening head 6. The rotating negative pressure adsorption assembly 56 includes a receiving groove 561 opened inside the capacitive pen tightening head 6 for accommodating capacitive pen parts, a rotating groove 562 coaxially opened on the side wall of the capacitive pen tightening head 6, and a plurality of negative pressure adsorption grooves 563 evenly opened along the circumferential direction in the rotating groove 562, which are connected to the receiving groove 561. A negative pressure adsorption ring is rotatably connected coaxially in the receiving groove 561. 564. A plurality of negative pressure adsorption holes 565 are evenly distributed along the circumference on the inner wall of the negative pressure adsorption ring 564. A negative pressure adsorption tube 566, which communicates with the plurality of negative pressure adsorption holes 565, is fixedly connected to the outer wall of the negative pressure adsorption ring 564. A negative pressure pump is connected to the negative pressure tube 566. When it is necessary to adsorb the parts of the capacitive pen, the negative pressure pump provides negative pressure to the inside of the negative pressure adsorption ring 564 through the negative pressure adsorption tube 566. The negative pressure adsorption holes 565 on the inner wall of the negative pressure adsorption ring 564 will generate adsorption force, thereby realizing the adsorption of the parts of the capacitive pen. The part is adsorbed in the receiving groove 561. Simultaneously, as the capacitive pen tightening head 6 rotates, the negative pressure adsorption ring 564 remains stationary. The negative pressure adsorption grooves 563, evenly distributed along the circumference in the rotating grooves 562 on the side wall of the capacitive pen tightening head 6, maintain constant communication with the negative pressure adsorption holes 565 on the inner wall of the negative pressure adsorption ring 564, ensuring continuous negative pressure adsorption. This allows the capacitive pen tightening head 6 to both pick up the part and tighten it. To ensure that the negative pressure adsorption grooves 563 and negative pressure adsorption holes 565 remain connected during the rotation of the capacitive pen tightening head 6, the number of negative pressure adsorption holes 565 is at least twice the number of negative pressure adsorption grooves 563, ensuring that there is always a negative pressure adsorption hole 565 connecting with a negative pressure adsorption groove 563 to maintain continuous negative pressure. Alternatively, the gap between the negative pressure adsorption grooves 563 can be set smaller than the diameter of the negative pressure adsorption holes 565 to achieve continuous negative pressure.
[0028] Brief description of the usage process: First, the horizontal lead screw slide 21 and the vertical lead screw lifting slide 23 of the sliding lifting assembly 2 drive the material picking mounting base 3 and the torque tightening assembly 5 to move to the material picking position of the capacitive pen parts; then, the negative pressure pump of the rotating negative pressure adsorption assembly 56 supplies negative pressure to the negative pressure adsorption ring 564 through the negative pressure adsorption pipe 566, so that the negative pressure adsorption holes 565 in the receiving groove 561 generate adsorption force, firmly adsorbing the capacitive pen parts to be assembled into the receiving groove 561; then, the sliding lifting assembly 2 drives the torque tightening assembly 5 and the... The capacitive pen parts are moved to the capacitive pen assembly station, aligning the adsorbed parts with the parts to be connected. The tightening motor 53 is started, driving the torque sensor 51, tightening mounting rod 54, and capacitive pen tightening head 6 to rotate synchronously through the coupling 52. The parts begin to tighten with the tightening head. When the torque sensor 51 detects that the tightening torque has reached the preset value, it immediately controls the tightening motor 53 to stop rotating, completing the tightening of the capacitive pen parts. After tightening is completed, the negative pressure adsorption component 56 is rotated to stop the pressure supply, releasing the adsorption on the parts, and this process is repeated.
[0029] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment that make creative contributions as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A torque tightening device for a capacitive pen comprising a base (1); characterized in that, The base (1) is movably connected to a material picking mounting seat (3) based on a sliding lifting assembly (2). The material picking mounting seat (3) is movably connected to at least one set of torque tightening assemblies (5) in the vertical direction based on a floating buffer assembly (4). The tightening end of the torque tightening assembly (5) is detachably provided with a capacitive pen tightening head (6) for adsorbing capacitive pen parts.
2. A torque tightening device for a capacitive stylus according to claim 1, wherein The sliding lifting assembly (2) includes a horizontal lead screw slide (21) fixedly connected to the base (1) in the horizontal direction and a vertical mounting base (22) fixedly connected to the sliding end of the horizontal lead screw slide (21). A vertical lead screw lifting slide (23) is fixedly connected to the vertical mounting base (22) in the vertical direction. The material picking mounting base (3) is fixedly connected to the sliding end of the vertical lead screw lifting slide (23) in the vertical direction.
3. A torque screwing device for a capacitive pen according to claim 1, wherein The floating buffer assembly (4) includes a vertical slide rail (41) fixedly connected to the material picking mounting base (3) in the vertical direction and a tightening seat (42) slidably connected to the vertical slide rail (41) in the vertical direction for installing the torque tightening assembly (5). A buffer seat (43) is fixedly connected to the top of the material picking mounting base (3) in the horizontal direction. At least one floating rod (44) is fixedly connected to the top of the tightening seat (42) in the vertical direction. A floating hole that cooperates with the floating rod (44) is opened on the buffer seat (43). A buffer spring (45) is sleeved on the floating rod (44). A limit block (46) is fixedly connected to the top of the floating rod (44) away from the tightening seat (42).
4. A torque screwing device for a capacitive pen according to claim 3, characterized in that, The torque tightening assembly (5) includes a torque sensor (51) fixedly connected to the tightening seat (42). A tightening motor (53) is fixedly connected to the tightening seat (42) and connected to the input end of the torque sensor (51) via a coupling (52). A tightening mounting rod (54) is also rotatably connected to the tightening seat (42) and connected to the output end of the torque sensor (51) via a coupling (52). The capacitive pen tightening head (6) is detachably and fixedly connected to the tightening mounting rod (54) via a magnetic drive assembly (55). The capacitive pen tightening head (6) is provided with a rotating negative pressure adsorption assembly (56) for adsorbing capacitive pen parts.
5. A torque screwing device for a capacitive pen according to claim 4, characterized in that, The magnetic drive assembly (55) includes a magnetic hole (551) at the bottom of the tightening mounting rod (54) and a magnetic rod (552) protruding and fixedly connected to the top of the capacitive pen tightening head (6). A magnetic block (553) for attracting the magnetic rod (552) is fixedly connected in the magnetic hole (551). At least two positioning drive grooves (554) are evenly provided in the magnetic hole (551) along the circumferential direction. Several protruding positioning drive blocks (555) are evenly provided in the magnetic rod (552) along the circumferential direction for cooperating with the positioning drive grooves (554).
6. A torque screwing device for a capacitive pen according to claim 4, wherein The rotating negative pressure adsorption assembly (56) includes a receiving groove (561) opened in the capacitive pen tightening head (6) for accommodating capacitive pen parts. A rotating groove (562) is coaxially opened on the side wall of the capacitive pen tightening head (6). A plurality of negative pressure adsorption grooves (563) communicating with the receiving groove (561) are evenly opened in the rotating groove (562) along the circumferential direction. A negative pressure adsorption ring (564) is coaxially rotatably connected in the receiving groove (561). A plurality of negative pressure adsorption holes (565) are evenly opened in the inner wall of the negative pressure adsorption ring (564) along the circumferential direction. A negative pressure adsorption tube (566) communicating with the plurality of negative pressure adsorption holes (565) is fixedly connected to the outer wall of the negative pressure adsorption ring (564). A negative pressure pump is externally connected to the negative pressure adsorption tube (566).
7. A torque screwing device for a capacitive pen according to claim 4, characterized in that, The tightening motor (53) is a servo motor and is coupled to the torque sensor (51).
8. The torque screwing device for a capacitance pen according to claim 1, wherein The torque tightening assembly (5) is provided in two sets in parallel.