Active stylus pen nose cone pressing mechanism

Abstract

The active touch pen nose cone pressing mechanism provided by the present invention includes a base plate, a pen tip clamping assembly, a nose cone clamping assembly, and a pen tip loading assembly; the pen tip clamping assembly includes a bracket seat connected to the base plate so as to be movably connected left and right, a rotating bracket rotatably connected to the bracket seat, and a three-claw cylinder connected to the rotating bracket; the nose cone clamping assembly includes a base connected to the base plate and located on the right side of the bracket seat, a nose cone seat for clamping the nose cone and detachably inserted on the base; the pen tip loading assembly includes a pen tip seat for placing the pen tip, a cover plate movably arranged above the pen tip seat, a pressure head connected to the cover plate and aligned with the pen tip groove on the pen tip seat, a locking plate for locking the cover plate, and a positioning pin arranged on the left side of the pen tip seat; when the pen tip is transferred for loading, the positioning pin is inserted into the positioning hole, so that the pen tip is inserted into the three-claw cylinder in a set posture. The mechanism is easy to operate, has accurate positioning during pressing, has low labor intensity, and will not cause dislocation.

Description

Technical Field

[0001] The invention belongs to the technical field of stylus pen production, and in particular relates to a nose cone pressing mechanism for an active stylus pen. Background Art

[0002] A stylus is a commonly used input component for touch-screen devices. It is used to replace fingers for precise clicking, drawing lines, and other operations on the touch screen. Existing styluses are roughly divided into two categories: passive styluses and active styluses. Passive styluses cannot interact with touch-screen devices and can only simulate the clicking action of fingers. They have fewer functions. Active styluses can interact with touch-screen devices and have more powerful functions when used. Most mainstream touch-screen devices on the market (such as tablets, iPads, etc.) are equipped with active styluses.

[0003] To achieve information interaction with touch-screen devices, most active styluses include a pen tip with HSG function, a PCB board that is inserted into the pen tip and extends from the end of the pen tip for signal transmission, and a nose cone that is mounted on the end of the pen tip for connecting to the pen body. These components are relatively small in size. Generally speaking, the pen tip is cylindrical, with a length not exceeding 16mm and a diameter not exceeding 2.5mm; the PCB board is long and has a length not exceeding 10mm, a thickness not exceeding 0.8mm, and a width not exceeding 1.6mm; the nose cone is no longer than 12mm and a diameter not exceeding 8mm. To ensure the assembly effect of the pen tip and the nose cone, when mounting, it is necessary to first apply glue circumferentially to the corresponding position of the pen tip, and then squeeze it into the nose cone in a set posture for press-fit bonding. The existing production method is usually manual: first hold the pen tip in one hand and the glue gun in the other hand, and achieve 360-degree glue application by rotating the pen tip and pushing the glue gun to discharge glue. After the glue application is completed, hold the pen tip in one hand and the nose cone in the other hand, and press-fit bonding by squeezing the pen tip backwards into the nose cone. This method has at least the following problems:

[0004] 1. Due to the small size of the pen tip and nose cone, and the irregular shape of the pen tip, it is not convenient for people to hold it.

[0005] 2. After holding it, you need to clamp it tightly and concentrate to press and position the pen tip and nose cone, which is labor-intensive.

[0006] 3. During the gluing and pressing process, if the hands shake, it will cause the gluing or pressing to be misplaced, making it impossible to guarantee the consistency and yield of the product. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an active stylus pen nose cone press-fitting mechanism that is easy to operate, has low labor intensity, and does not cause dislocation.

[0008] To achieve the above-mentioned object, the present invention provides a technical solution, which is a nose cone pressing mechanism for an active stylus pen tip, comprising: a rectangular substrate extending in a horizontal direction, a tip clamping assembly and a nose cone clamping assembly provided on the substrate, and a tip loading assembly for transferring the tip to the tip clamping assembly in a set posture;

[0009] The pen tip clamping assembly includes a bracket seat, a rotating bracket, and a three-claw cylinder. The bracket seat is connected to the upper surface of the base plate so as to be movable left and right. The rotating bracket is rotatably connected to the left end of the bracket seat. The rotation axis of the rotating bracket extends horizontally in the left and right directions. The three-claw cylinder is connected to the left end of the rotating bracket through a buffer unit. The three-claw cylinder is used to clamp the pen tip. When the three-claw cylinder clamps the pen tip, the axis of the pen tip coincides with the rotation axis of the rotating bracket.

[0010] The nose cone clamping assembly includes a base and a nose cone seat, wherein the base is connected to the upper surface of the base plate and is located to the right of the bracket seat, and the nose cone seat is used to clamp the nose cone and is detachably inserted into the upper surface of the base. When the nose cone seat clamps the nose cone, the axis of the nose cone coincides with the rotation axis of the rotating bracket.

[0011] The pen tip loading assembly includes a pen tip seat, a cover plate, a pressure head, a locking plate and a positioning pin, the upper end surface of the pen tip seat is provided with a pen tip groove for placing the pen tip, the pen tip groove extends in the left and right directions and passes through the left side of the pen tip seat, the cover plate is movably arranged above the pen tip seat, the pressure head is connected to the cover plate and aligned with the pen tip groove, the locking plate is rotatably connected to the front and rear side surfaces of the pen tip seat, the positioning pin is arranged on the left side of the pen tip seat, and there are multiple positioning pins and they correspond to the positioning holes opened on the right end surface of the three-claw cylinder;

[0012] When the pen tip is placed in the pen tip slot, the length of the pen tip extending out of the pen tip slot is less than the length of the positioning pin; when the cover plate moves downward so that the pressure head presses the pen tip into the pen tip slot, the locking plate rotates and hooks into the locking slots on both sides of the cover plate, so that the relative position of the pen tip and the pen tip loading assembly is locked; when the pen tip is transferred for loading, the positioning pin is inserted into the positioning hole, so that the pen tip is inserted between the jaws of the three-jaw cylinder in a set posture.

[0013] Preferably, the pen tip clamping assembly also includes a first driving unit for driving the bracket seat to move left and right, the first driving unit includes a screw pair and a first servo motor arranged on the lower surface of the substrate, the first servo motor is used to drive the screw in the screw pair to rotate, the bottom of the bracket seat is connected to the nut in the screw pair, and the substrate is provided with an avoidance groove for avoiding the nut.

[0014] Further preferably, the upper surface of the base plate is provided with two first slide rails extending in the left-right direction and spaced apart from each other, the first slide rails are provided with slidable first sliders, and the bracket seat is mounted on the first sliders.

[0015] Preferably, the pen tip clamping assembly also includes a second driving unit for driving the rotating bracket to rotate, the second driving unit includes a reducer and a second servo motor, the reducer is arranged on the bracket seat, the second servo motor is arranged on the left side of the reducer, and the second servo motor is connected to the rotating bracket through the reducer. When the second servo motor rotates, the rotating bracket can be driven to rotate relative to the bracket seat through the reducer.

[0016] Further preferably, the rotating bracket is connected to the bracket seat through a first connecting plate and a second connecting plate arranged in sequence from left to right, the first connecting plate can move up and down relative to the bracket seat, the second connecting plate can move forward and backward relative to the first connecting plate, and the upper end surface of the second connecting plate is provided with a U-shaped groove for accommodating the reducer.

[0017] Preferably, the buffer unit includes a buffer spring and a pressure sensor arranged in sequence from left to right, and when the detection value of the pressure sensor is greater than a set value, the bracket seat stops moving.

[0018] Preferably, the bracket seat is provided with a second slide rail extending in the left-right direction, the second slide rail is provided with a slidable second slider, and the three-claw cylinder is mounted on the second slider.

[0019] Preferably, the three-claw cylinder is mounted on the second slider through a third connecting plate and a fourth connecting plate arranged in sequence from left to right, the third connecting plate can move forward and backward relative to the second slider, and the fourth connecting plate can move up and down relative to the third connecting plate, and the cylinder body of the three-claw cylinder is connected to the right side of the fourth connecting plate.

[0020] Preferably, the nose cone seat includes a seat body, a pressure plate, and a locking block. The seat body is provided with a nose cone groove for placing the nose cone, and the left groove edge of the nose cone groove extends inward to form a retaining ring for preventing the nose cone from moving to the left. The pressure plate extends in the front-to-back direction and is arranged above the nose cone groove. The front end of the pressure plate is rotatably connected to the seat body, and the lower surface of the pressure plate is embedded with a silicone pad corresponding to the nose cone groove. The locking block is located behind the pressure plate and is movably connected to the seat body. When the pressure plate rotates to cause the silicone pad to press the nose cone into the nose cone groove, the locking block hooks the rear end of the pressure plate to keep the relative position of the nose cone and the nose cone seat locked.

[0021] Further preferably, a position adjustment column is provided on the left end face of the seat body, and the position adjustment column is offset from the positioning hole on the right end face of the three-claw cylinder. A torsion spring is provided between the left end portion of the pressure plate and the seat body, and the torsion spring has a tendency to drive the pressure plate to rotate upward, so that the silicone pad is moved away from the nose cone groove.

[0022] Further preferably, the nose cone clamping assembly also includes a toggle clamp, which is used to press the nose cone into the nose cone groove from right to left, and the toggle clamp is connected to the lower surface of the base, and the base is provided with a through groove for exposing the operating rod and the clamping rod of the toggle clamp.

[0023] Preferably, the upper surface of the pen tip holder is provided with a receiving groove with a U-shaped cross-section, and the pen tip groove is provided at the bottom of the receiving groove. The pen tip groove includes a first groove body with a V-shaped cross-section and a second groove body with a rectangular cross-section. The first groove body is located on the left side of the second groove body. The first groove body is used to place the cylindrical part of the pen tip, and the second groove body is used to place the PCB board of the pen tip.

[0024] Further preferably, the cover plate includes a lower cover plate and an upper cover plate, the lower cover plate can be movably arranged above the pen tip holder and covers the accommodating groove, the lower cover plate is provided with a vertical through groove, the upper cover plate is connected to the lower cover plate and covers the vertical through groove, a cover spring for driving the lower cover plate to move upward is provided between the lower cover plate and the pen tip holder, the pressure head can be movably arranged in the vertical through groove up and down, a floating spring is provided between the upper end of the pressure head and the upper cover plate, and the floating spring has a tendency to drive the pressure head to move downward.

[0025] Further preferably, the vertical through-groove includes a first through-groove located above the first groove body and a second through-groove located above the second groove body, the pressure head includes a first pressure head movably arranged in the first through-groove and a second pressure head movably arranged in the second through-groove, the lower surface of the first pressure head is provided with an arc surface matching the cylindrical portion, and the lower surface of the second pressure head is provided with a flat pressing surface matching the PCB board, when the locking plate disengages from the locking groove and the lower cover plate moves upward to the extreme position, the height difference between the highest point of the arc surface and the flat pressing surface is greater than or equal to the height difference between the highest point of the cylindrical portion and the upper surface of the PCB board.

[0026] Further preferably, a locking spring is provided between the locking plate and the pen tip holder, the locking spring is located below the rotating shaft of the locking plate, the two ends of the locking spring respectively press against the locking plate and the pen tip holder, and the locking groove is provided on the lower cover plate.

[0027] Further preferably, the lower cover plate is provided with a first horizontal hole and a second horizontal hole that pass through vertically, the first horizontal hole passes through the lower cover plate in the left-right direction, the second horizontal hole extends in the front-back direction, the opening of the second horizontal hole is located above the lock slot, a first push rod that can slide axially is provided in the first horizontal hole, and a second push rod that can slide axially is provided in the second horizontal hole, the first push rod and the second push rod are slidingly connected by a matching inclined surface of 40° to 60°, and when the first push rod moves to the right, the second push rod can be pushed outward by the matching inclined surface, so that the second push rod extends out and pushes open the locking plate in the lock slot.

[0028] Further preferably, the left end portion of the first push rod protrudes to the left from the left side of the pen tip holder to form a trigger protrusion. When the three-jaw cylinder clamps the pen tip, the clamping claw of the three-jaw cylinder pushes the trigger protrusion to move the first push rod to the right, so that the locking plate disengages from the locking groove.

[0029] Further preferably, the trigger protrusion is provided with a guide slope extending obliquely to the left and downward.

[0030] Further preferably, there are two second push rods and they are spaced apart in the left-right direction.

[0031] Preferably, the right end surface of the three-claw cylinder, the left end surface of the nose cone seat and the left end surface of the pen tip seat are all provided with magnets.

[0032] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0033] 1. By providing a pen tip loading component and a pen tip clamping component to transport and clamp the pen tip, and providing a nose cone loading component to clamp the nose cone, it can well replace the manual holding operation, thereby adapting to the characteristics of small size and irregular shape of the pen tip and nose cone, and is easy to operate.

[0034] 2. By using the three-claw cylinder of the pen tip clamping assembly to clamp the pen tip, and using the nose cone seat of the nose cone loading assembly to clamp the nose cone, it can be conveniently clamped. After clamping, the axis of the pen tip and the nose cone coincides with the rotation axis of the rotating bracket, and the positioning is accurate during press-fitting with low labor intensity.

[0035] 3. After the pen tip and nose cone are clamped, there is no shaking. You only need to rotate the rotating bracket or move the bracket seat to the right to achieve gluing and pressing operations. There will be no misalignment, and the consistency and yield of the product can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the present invention.

[0037] Figure 2 yes Figure 1 A three-dimensional schematic diagram after the pen tip loading component is hidden.

[0038] Figure 3 yes Figure 2 Schematic top view of .

[0039] Figure 4 yes Figure 3 Schematic cross-sectional view in the AA direction.

[0040] Figure 5 yes Figure 3 Schematic cross-sectional view in the BB direction.

[0041] Figure 6 yes Figure 2 A three-dimensional enlarged schematic diagram of the pen tip clamping assembly, omitting components such as the first servo motor and reducer.

[0042] Figure 7 yes Figure 5 A partial enlarged schematic diagram of point C in the middle.

[0043] Figure 8 、 Figure 9 yes Figure 2 A magnified perspective diagram of the mid-nose cone clamping assembly.

[0044] Figure 10 yes Figure 2 A magnified perspective view of the mid-nose cone clamping assembly with the base hidden.

[0045] Figure 11 yes Figure 1Schematic top view of the middle pen tip loading assembly.

[0046] Figure 12 yes Figure 11 Schematic cross-sectional view in the DD direction.

[0047] Figure 13 yes Figure 11 Schematic cross-sectional view in the EE direction.

[0048] Figure 14 yes Figure 11 Schematic cross-sectional view in the FF direction.

[0049] Figure 15 yes Figure 1 A left view schematic diagram of another type of pen tip loading assembly.

[0050] Figure 16 yes Figure 15 Schematic cross-sectional view in the GG direction.

[0051] Wherein: 10. Base plate; 11. Avoidance groove; 12. First slide rail; 13. First slider; 20. Pen tip clamping assembly; 21. Bracket; 211. Second slide rail; 212. Second slider; 22. Rotating bracket; 221. First connecting plate; 222. Second connecting plate; 223. First upper and lower slide rail pair; 224. First front and rear slide rail pair; 225. U-shaped groove; 23. Three-claw cylinder; 231. Cylinder body; 232. Clamping jaw; 233. Positioning hole; 234. Third connecting plate; 235. Fourth connecting plate; 236. Second front and rear slide rail pair; 237. Second upper and lower slide rail pair; 24. Buffer unit; 241. Buffer spring; 242. Pressure sensor; 243. Pressure sensor base plate; 25. First drive unit; 251. Screw; 252. Nut; 253. First servo motor; 26. Second drive unit; 261. Reducer; 262. Second servo motor; 30. Nose cone clamping assembly; 31. Base; 311. Through slot; 32. Nose cone seat; 321. Seat body; 322. Pressing plate; 323. Locking block; 324. Nose cone groove; 325. Retaining ring; 326. Silicone pad; 327. Position adjustment column; 328. Torsion spring; 33. Toggle clamp; 331. Operating lever; 332. Clamping lever; 40. Nib loading assembly; 41. Nib holder; 411. Receiving slot; 412. First slot body; 413. Second slot body; 421. Lower cover; 422. Upper cover; 423. Cover spring; 424. First through-slot; 425. Second through-slot; 426. Locking slot; 431. First pressure head; 432. Second pressure head; 433. Arc surface; 434. Flat pressure surface; 435. First floating spring; 436. Second floating spring; 44. Locking plate; 441. Locking spring; 45. Locating pin; 461. First horizontal hole; 462. Second horizontal hole; 463. First push rod; 464. Second push rod; 465. Matching slope; 466. Trigger protrusion; 467. Guide slope; 50. Pen tip; 51. Cylindrical portion; 52. PCB board; 60. Nose cone. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0053] The up and down, left and right directions described in the present invention are Figure 4 The up and down, left and right directions in the present invention are the front and back directions. Figure 3 The down-up direction in .

[0054] like Figures 1 to 14 As shown, the active stylus pen nose cone press-fitting mechanism provided by the present invention includes:

[0055] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is that the active touch pen pen tip nose cone pressing mechanism includes: a substrate 10, a pen tip clamping assembly 20, a nose cone clamping assembly 30, and a pen tip loading assembly 40, wherein the substrate 10 is a rectangular substrate extending in the horizontal direction; the pen tip clamping assembly 20 is arranged on the substrate 10, specifically, the pen tip clamping assembly 20 includes a bracket seat 21, a rotating bracket 22, and a three-claw cylinder 23, the bracket seat 21 can be connected to the upper surface of the substrate 10 so as to be movable left and right, the rotating bracket 22 can be rotatably connected to the left end of the bracket seat 21, and the rotation axis of the rotating bracket 22 extends horizontally in the left and right directions, and the three-claw cylinder 23 The cylinder 23 is connected to the left end of the rotating bracket 22 through the buffer unit 24. The three-claw cylinder 23 is used to clamp the cylindrical part 51 at the left end of the pen tip 50. When the three-claw cylinder 23 clamps the pen tip 50, the axis of the cylindrical part 51 of the pen tip 50 coincides with the rotation axis of the rotating bracket 22; the nose cone clamping assembly 30 is also arranged on the substrate 10. Specifically, the nose cone clamping assembly 30 includes a base 31 and a nose cone seat 32. The base 31 is connected to the upper surface of the substrate 10 and is located to the right of the bracket seat 21. The nose cone seat 32 is used to clamp the nose cone 60 and is detachably inserted on the upper surface of the base 31. When the nose cone seat 32 clamps the nose cone 60, the nose cone 60 The axis of the pen tip loading assembly 40 coincides with the axis of rotation of the rotating bracket 22; the pen tip loading assembly 40 is used to transfer the pen tip 50 to the pen tip clamping assembly 20 in a set posture. Specifically, the pen tip loading assembly 40 includes a pen tip seat 41, a cover plate, a pressure head, a locking plate 44 and a positioning pin 45. The upper end surface of the pen tip seat 41 is provided with a pen tip groove for placing the pen tip 50. The pen tip groove extends in the left and right directions and passes through the left side of the pen tip seat 41. The cover plate is movably arranged above the pen tip seat 41. The pressure head is connected to the cover plate and aligned with the pen tip groove. The locking plate 44 is rotatably connected to the front and rear sides of the pen tip seat 41. The positioning pin 45 is arranged on the left side of the pen tip seat 41. On the side, there are two locating pins 45 and they correspond to the locating holes 233 opened on the right end face of the cylinder body 231 of the three-claw cylinder 23 (one-to-one correspondence); when the pen tip 50 is placed in the pen tip groove, the length of the cylindrical part 51 at the left end of the pen tip 50 extending out of the pen tip groove is less than the length of the locating pin 45; when the cover plate moves downward, so that the pressure head presses the pen tip 50 tightly in the pen tip groove, the locking plate 44 rotates and hooks the locking grooves 426 on both sides of the cover plate, so that the relative position of the pen tip 50 and the pen tip loading assembly 40 is locked; when the pen tip 50 is transferred for loading, the locating pin 45 is inserted into the locating hole 233, so that the pen tip 50 is inserted between the clamping jaws 232 of the three-claw cylinder 23 in a set posture.

[0056] The benefits of this setting are:

[0057] 1. It can effectively replace manual holding operations, thus adapting to the small size and irregular shape of pen tips and nose cones, and is easy to operate.

[0058] 2. Accurate positioning during press-fitting and low labor intensity.

[0059] 3. After the pen tip and nose cone are clamped, there is no shaking. You only need to rotate the rotating bracket or move the bracket seat to the right to achieve gluing and pressing operations. There will be no misalignment, and the consistency and yield of the product can be guaranteed.

[0060] In this embodiment, the pen tip clamping assembly 20 also includes a first drive unit 25 for driving the bracket seat 21 to move left and right. The first drive unit 25 includes a screw pair and a first servo motor 253 arranged on the lower surface of the substrate 10. The first servo motor 253 is used to drive the screw 251 in the screw pair to rotate. The bottom of the bracket seat 21 is connected to the nut 252 in the screw pair. An avoidance groove 11 is provided on the substrate 10 to avoid the movement of the nut 252.

[0061] In order to guide the left and right movement of the bracket seat 21, the upper surface of the base plate 10 is further provided with two first slide rails 12 extending in the left and right directions and arranged at intervals in front and back. The first slide rails 12 are provided with a sliding first slider 13, and the bracket seat 21 is mounted on these two first sliders 13.

[0062] In this embodiment, the pen tip clamping assembly 20 also includes a second drive unit 26 for driving the rotating bracket 22 to rotate. The second drive unit 26 includes a reducer 261 and a second servo motor 262. The reducer 261 is arranged on the bracket seat 21, and the second servo motor 262 is arranged on the left side of the reducer 261. The second servo motor 262 is connected to the rotating bracket 22 through the reducer 261. When the second servo motor 262 rotates, the reducer 261 can drive the rotating bracket 22 to rotate relative to the bracket seat 21, thereby driving the pen tip 50 clamped by the three-claw cylinder 23 to rotate, thereby facilitating the gluing operation.

[0063] In order to facilitate the adjustment of the position of the rotation axis of the rotating bracket 22 so that it can coincide with the axis of the nose cone 60 clamped by the nose cone seat 32, in this embodiment, the rotating bracket 22 is connected to the bracket seat 21 through a first connecting plate 221 and a second connecting plate 222 arranged from left to right. The first connecting plate 221 can move up and down relative to the bracket seat 21, and the second connecting plate 222 can move forward and backward relative to the first connecting plate 221. Specifically, the first connecting plate 221 is connected to the right side of the bracket seat 21 through a first upper and lower slide rail pair 223, and the second connecting plate 222 is connected to the right side of the first connecting plate 221 through a first front and rear slide rail pair. Furthermore, the upper end face of the second connecting plate 222 is also provided with a U-shaped groove 225 for accommodating the reducer 261.

[0064] In this embodiment, the buffer unit 24 includes a buffer spring 241 and a pressure sensor 242 arranged in sequence from left to right. Specifically, the left and right ends of the buffer spring 241 respectively press against the second connecting plate 222 and the pressure sensor 242, and the pressure sensor 242 is fixed on the pressure sensor seat plate 243.

[0065] When the detection value of the pressure sensor 242 is greater than the set value (40N), the bracket seat 21 stops moving. Specifically, the pressure sensor 242 is electrically connected to the controller of the first servo motor 253. When the detection value of the pressure sensor 242 is greater than the set value, the controller of the first servo motor 253 controls the first servo motor 253 to stop rotating to avoid the pen tip 50 from inserting into the nose cone 60 with too much force and causing damage.

[0066] To facilitate guidance, in this embodiment, a second slide rail 211 extending in the left and right directions is further provided on the bracket seat 21, and a sliding second slider 212 is provided on the second slide rail 211. The three-claw cylinder 23 is mounted on the second slider 212 through the pressure sensor seat plate 243. Specifically, the pressure sensor seat plate 243 is mounted on the second slider 212, and the three-claw cylinder 23 is connected to the right side of the pressure sensor seat plate 243.

[0067] In order to facilitate the adjustment of the position of the axis center line of the three-claw cylinder 23 so that it can coincide with the rotation axis center line of the rotating bracket 22, in this embodiment, the three-claw cylinder 23 is mounted on the second slider 212 through a third connecting plate 234 and a fourth connecting plate 235 arranged in sequence from left to right. Specifically, the third connecting plate 234 is connected to the right side of the pressure sensor seat plate 243 by a second front and rear slide rail pair 236 and can be moved forward and backward. The fourth connecting plate 235 is connected to the right side of the third connecting plate 234 by a second upper and lower slide rail pair 237 and can be moved up and down. The cylinder body 231 of the three-claw cylinder 23 is connected to the right side of the fourth connecting plate 235, so that the third connecting plate 234 can move forward and backward relative to the second slider 212, and the fourth connecting plate 235 can move up and down relative to the third connecting plate 234.

[0068] The nose cone seat 32 comprises a seat body 321, a pressure plate 322 and a locking block 323. The seat body 321 is provided with a nose cone groove 324 for placing the nose cone 60. The left groove edge of the nose cone groove 324 extends inward to form a retaining ring 325 for preventing the nose cone 60 from moving leftward. The pressure plate 322 extends in the front-to-back direction and is arranged above the nose cone groove 324. The front end portion of the pressure plate 322 is rotatably connected to the seat body 321. The lower surface of the pressure plate 322 is embedded with a silicone pad 326 corresponding to the nose cone groove 324. The locking block 323 is located behind the pressure plate 322 and is movably connected to the seat body 321. When the pressure plate 322 rotates to cause the silicone pad 326 to press the nose cone 60 into the nose cone groove 324, the locking block 323 hooks the rear end portion of the pressure plate 322, so that the relative position of the nose cone 60 and the nose cone seat 32 remains locked.

[0069] In order to prevent the pen tip 50 from being over-inserted into the nose cone 60, in this embodiment, a position adjustment column 327 is also provided on the left end face of the seat body 321. The position adjustment column 327 is staggered with the positioning hole 233 on the right end face of the cylinder body 231 of the three-claw cylinder 23. When the bracket seat 21 moves to the right to allow the pen tip 50 to be inserted into the nose cone 60 in a set posture, the position adjustment column 327 controls the insertion depth of the pen tip 50 by pressing against the right end face of the cylinder body 231.

[0070] To facilitate loading and unloading, a torsion spring 328 is further provided between the left end of the pressing plate 322 and the seat body 321 . The torsion spring 328 has the tendency to drive the pressing plate 322 to rotate upward, so that the silicone pad 326 moves away from the nose cone groove 324 .

[0071] In order to prevent the nose cone 60 from moving to the right when the pen tip 50 is inserted, in this embodiment, the nose cone clamping assembly 30 also includes a toggle clamp 33, which is used to press the nose cone 60 from right to left into the nose cone groove 324. The toggle clamp 33 is connected to the lower surface of the base 31, and the base 31 is provided with a through groove 311 for exposing the operating rod 331 and the tightening rod 332 of the toggle clamp 33.

[0072] In this embodiment, a receiving groove 411 with a U-shaped cross-section is provided on the upper surface of the pen tip holder 41. The receiving groove 411 is used to accommodate the lower end of the pressure head. The pen tip groove is provided at the bottom of the receiving groove 411. The pen tip groove includes a first groove body 412 with a V-shaped cross-section and a second groove body 413 with a rectangular cross-section. The first groove body 412 is located on the left side of the second groove body 413. The first groove body 412 is used to place the cylindrical part 51 of the pen tip 50, and the second groove body 413 is used to place the PCB board 52 of the pen tip 50.

[0073] Furthermore, the cover plate includes a lower cover plate 421 and an upper cover plate 422. The lower cover plate 421 can be moved up and down above the pen tip holder 41 and covers the accommodating groove 411. The lower cover plate 421 is provided with a vertical through groove. The upper cover plate 422 is connected to the lower cover plate 421 and covers the vertical through groove. A cover spring 423 is provided between the lower cover plate 421 and the pen tip holder to drive the lower cover plate 421 to move upward. The pressure head can be moved up and down in the vertical through groove. A floating spring is provided between the upper end of the pressure head and the upper cover plate 422. The floating spring has a tendency to drive the pressure head to move downward.

[0074] Specifically, the projection of the vertical through groove in the front-to-back direction is T-shaped, and the vertical through groove includes a first through groove 424 located above the first groove body 412 and a second through groove 425 located above the second groove body 413. The shape of the pressure head matches the shape of the vertical through groove, and the pressure head includes a first pressure head 431 that can be moved up and down through the first through groove 424 and a second pressure head 432 that can be moved up and down through the second through groove 425. The lower surface of the first pressure head 431 is provided with an arc surface 433 that matches the cylindrical portion 51, and the second pressure head 4 The lower surface of 32 is provided with a flat pressing surface 434 matching the PCB board 52, and the floating spring includes a first floating spring 435 arranged between the upper end of the first pressing head 431 and the upper cover plate 422 and a second floating spring 436 arranged between the upper end of the second pressing head 432 and the upper cover plate 422. When the locking plate 44 disengages from the locking groove 426 and the lower cover plate 421 moves upward to the extreme position, the height difference between the highest point of the arc surface 433 and the flat pressing surface 434 is greater than the height difference between the highest point of the cylindrical portion 51 and the upper surface of the PCB board 52.

[0075] The advantage of this arrangement is that when the lower cover 421 moves downward to press the pen tip 50 into the pen tip groove, the flat pressing surface 434 contacts the PCB board 52 first. If the PCB board 52 is placed with deviation, the flat pressing surface 434 can be pressed downward to make the PCB board 52 drive the cylindrical part 51 to rotate and make adjustments to ensure that the pen tip 50 is in the set posture when the arc surface 433 presses the cylindrical part 51 downward.

[0076] In order to achieve automatic seating of the lower cover 421, in this embodiment, a locking spring 441 is provided between the locking plate 44 and the pen tip holder 41. The locking spring 441 is located below the rotating shaft of the locking plate 44. The two ends of the locking spring 441 respectively press against the locking plate 44 and the pen tip holder 41, and the locking groove 426 is set on the lower cover 421.

[0077] In this embodiment, the clamping jaw 232 of the three-jaw air cylinder 23 is embedded in the cylinder body 231 so that the right end surface of the clamping jaw 232 is flush with the right end surface of the cylinder body 231 .

[0078] It should be noted that the active stylus pen tip nose cone pressing mechanism provided by the present invention must be provided with a locking part for locking the first connecting plate 221, the second connecting plate 222, the third connecting plate 234, and the fourth connecting plate 235, as well as a slot-type switch for detecting the origin position of the rotating bracket 22 and other components, and the tightening rod 332 of the elbow clamp 33 can only press against the lower edge of the nose cone 60 to avoid interfering with the insertion of the pen tip 50.

[0079] like Figure 15 and Figure 16 As shown, another pen tip loading assembly 40 provided by the present invention is further provided with a first horizontal hole 461 and a second horizontal hole 462 that pass through vertically on its lower cover 421. The first horizontal hole 461 passes through the lower cover 421 in the left-right direction, and the second horizontal hole 462 extends in the front-back direction. The opening of the second horizontal hole 462 is located above the locking slot 426. A first axially slidable push rod 463 is provided in the first horizontal hole 461, and an axially slidable second push rod 464 is provided in the second horizontal hole 462. The first push rod 463 and the second push rod 464 are slidably connected by a 52° matching bevel 465. When the first push rod 463 moves to the right, the second push rod 464 can be pushed outward by the matching bevel 465, so that the second push rod 464 extends out of the locking slot 426 and pushes open the locking plate 44 in the locking slot 426, thereby unlocking the lower cover 421.

[0080] Furthermore, the left end portion of the first push rod 463 protrudes to the left from the left side of the pen tip holder 41 to form a trigger protrusion 466. When the three-claw cylinder 23 clamps the pen tip 50, the clamping claw 232 of the three-claw cylinder 23 pushes the trigger protrusion 466, causing the first push rod 463 to move to the right, causing the locking plate 44 to disengage from the locking groove 426.

[0081] The advantage of this arrangement is that it can ensure that when the three-claw cylinder 23 is clamped, the lower cover 421 is in an unlocked state and can move upward under the drive of the cover spring 423, so that the pressure head is separated from the pen tip 50, facilitating the separation of the pen tip loading assembly 40.

[0082] Furthermore, a guiding inclined surface 467 extending obliquely to the left and downward is provided on the trigger protrusion 466. Meanwhile, there are two second push rods 464 which are spaced apart in the left-right direction.

[0083] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A nose cone press-fitting mechanism for an active stylus pen, comprising: A rectangular substrate extending in a horizontal direction, a pen tip clamping assembly and a nose cone clamping assembly provided on the substrate, and a pen tip loading assembly for transferring the pen tip to the pen tip clamping assembly in a set posture; Its characteristics are: The pen tip clamping assembly includes a bracket seat, a rotating bracket, and a three-claw cylinder. The bracket seat is connected to the upper surface of the base plate so as to be movable left and right. The rotating bracket is rotatably connected to the left end of the bracket seat. The rotation axis of the rotating bracket extends horizontally in the left and right directions. The three-claw cylinder is connected to the left end of the rotating bracket through a buffer unit. The three-claw cylinder is used to clamp the pen tip. When the three-claw cylinder clamps the pen tip, the axis of the pen tip coincides with the rotation axis of the rotating bracket. The nose cone clamping assembly includes a base and a nose cone seat, wherein the base is connected to the upper surface of the base plate and is located to the right of the bracket seat, and the nose cone seat is used to clamp the nose cone and is detachably inserted into the upper surface of the base. When the nose cone seat clamps the nose cone, the axis of the nose cone coincides with the rotation axis of the rotating bracket. The pen tip loading assembly includes a pen tip seat, a cover plate, a pressure head, a locking plate and a positioning pin, the upper end surface of the pen tip seat is provided with a pen tip groove for placing the pen tip, the pen tip groove extends in the left and right directions and passes through the left side of the pen tip seat, the cover plate is movably arranged above the pen tip seat, the pressure head is connected to the cover plate and aligned with the pen tip groove, the locking plate is rotatably connected to the front and rear side surfaces of the pen tip seat, the positioning pin is arranged on the left side of the pen tip seat, and there are multiple positioning pins and they correspond to the positioning holes opened on the right end surface of the three-claw cylinder; When the pen tip is placed in the pen tip slot, the length of the pen tip extending out of the pen tip slot is less than the length of the positioning pin; when the cover plate moves downward so that the pressure head presses the pen tip into the pen tip slot, the locking plate rotates and hooks into the locking slots on both sides of the cover plate, so that the relative position of the pen tip and the pen tip loading assembly is locked; when the pen tip is transferred for loading, the positioning pin is inserted into the positioning hole, so that the pen tip is inserted between the jaws of the three-jaw cylinder in a set posture.

2. The active stylus pen nose cone press-fitting mechanism according to claim 1, characterized in that: The pen tip clamping assembly also includes a first driving unit for driving the bracket seat to move left and right. The first driving unit includes a screw pair and a first servo motor arranged on the lower surface of the base plate. The first servo motor is used to drive the screw in the screw pair to rotate. The bottom of the bracket seat is connected to the nut in the screw pair, and an avoidance groove is provided on the base plate for avoiding the nut.

3. The active stylus pen nose cone press-fitting mechanism according to claim 2, characterized in that: Two first slide rails extending in the left-right direction and spaced apart are provided on the upper surface of the base plate. A slidable first slider is provided on the first slide rail, and the bracket seat is mounted on the first slider.

4. The active stylus pen nose cone press-fitting mechanism according to claim 1, characterized in that: The pen tip clamping assembly also includes a second driving unit for driving the rotating bracket to rotate, the second driving unit includes a reducer and a second servo motor, the reducer is arranged on the bracket seat, the second servo motor is arranged on the left side of the reducer, and the second servo motor is connected to the rotating bracket through the reducer. When the second servo motor rotates, the rotating bracket can be driven to rotate relative to the bracket seat through the reducer.

5. The active stylus pen nose cone press-fitting mechanism according to claim 4, characterized in that: The rotating bracket is connected to the bracket seat through a first connecting plate and a second connecting plate arranged in sequence from left to right. The first connecting plate can move up and down relative to the bracket seat, and the second connecting plate can move forward and backward relative to the first connecting plate. The upper end surface of the second connecting plate is provided with a U-shaped groove for accommodating the reducer.

6. The active stylus pen nose cone press-fitting mechanism according to claim 1, characterized in that: The buffer unit includes a buffer spring and a pressure sensor which are sequentially arranged from left to right. When the detection value of the pressure sensor is greater than a set value, the bracket seat stops moving.

7. The active stylus pen nose cone press-fitting mechanism according to claim 1, characterized in that: The bracket seat is provided with a second slide rail extending in the left-right direction, the second slide rail is provided with a slidable second slider, and the three-claw cylinder is mounted on the second slider.

8. The active stylus pen nose cone press-fitting mechanism according to claim 7, characterized in that: The three-claw cylinder is mounted on the second slider through a third connecting plate and a fourth connecting plate arranged in sequence from left to right. The third connecting plate can move forward and backward relative to the second slider, and the fourth connecting plate can move up and down relative to the third connecting plate. The cylinder body of the three-claw cylinder is connected to the right side of the fourth connecting plate.

9. The active stylus pen nose cone press-fitting mechanism according to claim 1, characterized in that: The nose cone seat includes a seat body, a pressure plate, and a locking block. The seat body is provided with a nose cone groove for placing the nose cone, and the left groove edge of the nose cone groove extends inward to form a retaining ring for preventing the nose cone from moving to the left. The pressure plate extends in the front-to-back direction and is arranged above the nose cone groove. The front end of the pressure plate is rotatably connected to the seat body, and the lower surface of the pressure plate is embedded with a silicone pad corresponding to the nose cone groove. The locking block is located behind the pressure plate and is movably connected to the seat body. When the pressure plate rotates to cause the silicone pad to press the nose cone into the nose cone groove, the locking block hooks the rear end of the pressure plate to keep the relative position of the nose cone and the nose cone seat locked.

10. The active stylus pen nose cone press-fitting mechanism according to claim 9, characterized in that: A position adjustment column is provided on the left end face of the seat body, and the position adjustment column is offset from the positioning hole on the right end face of the three-claw cylinder. A torsion spring is provided between the left end portion of the pressure plate and the seat body, and the torsion spring has the tendency to drive the pressure plate to rotate upward, so that the silicone pad is away from the nose cone groove.

11. The active stylus pen nose cone press-fitting mechanism according to claim 9, characterized in that: The nose cone clamping assembly also includes a toggle clamp, which is used to press the nose cone into the nose cone groove from right to left. The toggle clamp is connected to the lower surface of the base, and the base is provided with a through groove for exposing the operating rod and the clamping rod of the toggle clamp.

12. The active stylus pen nose cone press-fitting mechanism according to claim 1, characterized in that: The upper surface of the pen tip holder is provided with a receiving groove with a U-shaped cross-section, and the pen tip groove is provided at the bottom of the receiving groove. The pen tip groove includes a first groove body with a V-shaped cross-section and a second groove body with a rectangular cross-section. The first groove body is located on the left side of the second groove body. The first groove body is used to place the cylindrical part of the pen tip, and the second groove body is used to place the PCB board of the pen tip.

13. The active stylus pen nose cone press-fitting mechanism according to claim 12, characterized in that: The cover plate includes a lower cover plate and an upper cover plate, the lower cover plate can be movably arranged above the pen head holder and covers the accommodating groove, the lower cover plate is provided with a vertical through groove, the upper cover plate is connected to the lower cover plate and covers the vertical through groove, a cover spring for driving the lower cover plate to move upward is provided between the lower cover plate and the pen head holder, the pressure head can be movably arranged in the vertical through groove up and down, a floating spring is provided between the upper end portion of the pressure head and the upper cover plate, and the floating spring has a tendency to drive the pressure head to move downward.

14. The active stylus pen nose cone press-fitting mechanism according to claim 13, wherein: The vertical through-groove includes a first through-groove located above the first groove body and a second through-groove located above the second groove body. The pressure head includes a first pressure head that can be movably provided in the first through-groove and a second pressure head that can be movably provided in the second through-groove. The lower surface of the first pressure head is provided with an arc surface that matches the cylindrical portion, and the lower surface of the second pressure head is provided with a flat pressing surface that matches the PCB board. When the locking plate is disengaged from the locking groove and the lower cover plate moves upward to the extreme position, the height difference between the highest point of the arc surface and the flat pressing surface is greater than or equal to the height difference between the highest point of the cylindrical portion and the upper surface of the PCB board.

15. The active stylus pen nose cone press-fitting mechanism according to claim 13, wherein: A locking spring is provided between the locking plate and the pen tip holder. The locking spring is located below the rotating shaft of the locking plate. The two ends of the locking spring respectively press against the locking plate and the pen tip holder. The locking groove is provided on the lower cover plate.

16. The active stylus pen nose cone press-fitting mechanism according to claim 15, characterized in that: The lower cover plate is provided with a first horizontal hole and a second horizontal hole which pass through vertically. The first horizontal hole penetrates the lower cover plate in the left-right direction, and the second horizontal hole extends in the front-back direction. The opening of the second horizontal hole is located above the lock slot. A first push rod which can slide axially is provided in the first horizontal hole, and a second push rod which can slide axially is provided in the second horizontal hole. The first push rod and the second push rod are slidably connected by a matching inclined surface with an angle of 40° to 60°. When the first push rod moves to the right, the second push rod can be pushed outward by the matching inclined surface, so that the second push rod extends out and pushes open the locking plate in the lock slot.

17. The active stylus pen nose cone press-fitting mechanism according to claim 16, characterized in that: The left end portion of the first push rod protrudes to the left from the left side of the pen tip holder to form a trigger protrusion. When the three-jaw cylinder clamps the pen tip, the clamping claws of the three-jaw cylinder push the trigger protrusion to move the first push rod to the right, so that the locking plate disengages from the locking groove.

18. The active stylus pen nose cone press-fitting mechanism according to claim 17, wherein: The trigger protrusion is provided with a guiding inclined surface which extends obliquely to the left and downward.

19. The active stylus pen nose cone press-fitting mechanism according to claim 16, wherein: There are two second push rods, which are spaced apart in the left-right direction.

20. The active stylus pen nose cone press-fitting mechanism according to claim 1, wherein: The right end surface of the three-claw air cylinder, the left end surface of the nose cone seat and the left end surface of the pen tip seat are all provided with magnets.

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