Electromagnetic pen

Abstract

The utility model provides an electromagnetic pen. The electromagnetic pen comprises a pen core, a clamping piece, a transmission piece and a pressure sensor. The device further comprises an elastic piece, and the elastic piece is clamped between the clamping piece and the transmission piece. The elastic piece is in a high-elastic state; the elastic piece is further provided with an umbrella-shaped structure, one end is an umbrella cover end, and the other end is a handle end. Due to the fact that the elastic piece is in a high-elasticity state and is of an umbrella-shaped structure, the umbrella cover end can effectively disperse and absorb pressure, obvious stress feedback cannot be generated after stress deformation, and a soft contact state is achieved. The pen is simple in structure, easy to install, high in sensitivity, soft in writing hand feeling and better in writing experience of a user.

Description

Technical field

[0001] The utility model relates to the technical field of intelligent accessories, in particular to an electromagnetic pen. [Background Technology]

[0002] With the improvement of science and technology, various intelligent terminal devices have become common tools in people's lives. The common interaction method of these terminal devices is touch operation, and electromagnetic pens have become a common input device to facilitate users to perform input operations such as writing or drawing.

[0003] The common electromagnetic pens currently have a pre-stressed spring installed in the cavity where the refill is located. The spring forces the transmission component and the pressure sensor to always be in contact. During the user's writing process, the writing pressure of the refill is transmitted to the pressure sensor through the spring and the transmission component, thereby realizing the transmission and recording of the handwriting signal. After writing is completed, the spring can also quickly reset the refill to its initial state before the force was applied. However, due to the characteristic of metal springs that they store energy and then release it after being deformed by force, obvious force feedback will be output to the refill during the actual writing process. During the writing process, the user needs to continue to apply greater force to the pen tip to offset this feedback, resulting in a poor writing feel and affecting the user's writing experience.

[0004] Therefore, it is necessary to provide an electromagnetic pen to solve the above problems, provide users with softer handwriting feedback, and improve the user's writing experience. [Utility Model Content]

[0005] The utility model provides an electromagnetic pen, which solves the problem of poor writing feel of electromagnetic pens in the related art.

[0006] The utility model provides an electromagnetic pen. The electromagnetic pen includes a pen core, a clamping member, a transmission member, and a pressure sensor; the electromagnetic pen also includes an elastic member, wherein the elastic member is clamped between the clamping member and the transmission member; the elastic member is in a highly elastic state; the elastic member also has an umbrella-like structure, with one end being an umbrella end and the other end being a handle end, the umbrella end being close to the clamping member, and the handle end being close to the transmission member.

[0007] The electromagnetic pen provided by the present invention has an elastic member clamped between the clamping member and the transmission member. Due to the interference fit between the pen core and the inner wall of the clamping member, the pen core will not shake significantly when clamped by the clamping member, and the elastic member causes the transmission member and the pressure sensor to be in contact. In the writing state, the writing pressure of the pen core is transmitted to the pressure sensor in sequence through the clamping member, the elastic member and the transmission member. Since the elastic member is in a highly elastic state and has an umbrella-like structure, the umbrella surface end can effectively disperse and absorb pressure, and no obvious force feedback will be generated after deformation by force, thereby achieving a soft contact state. Compared with related technologies, the electromagnetic pen has a simple structure, is easy to install, has high sensitivity and a soft writing feel.

Brief Description of the Drawings

[0008] Figure 1 This is a three-dimensional schematic diagram of the electromagnetic pen provided in one embodiment of the present invention with the shell removed.

[0009] Figure 2 for Figure 1 Exploded diagram of the electromagnetic pen shown.

[0010] Figure 3 for Figure 1 The cross-sectional view and partial enlarged view of the electromagnetic pen shown.

[0011] Figure 4 for Figure 1 An exploded schematic diagram of part of the structure of the electromagnetic pen is shown.

[0012] Figure 5 for Figure 1 The three-dimensional schematic diagram of the front compartment of the electromagnetic pen is shown.

[0013] Figure 6 for Figure 1 A three-dimensional schematic diagram of the fixing base of the electromagnetic pen is shown. [Specific implementation method]

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0016] See also Figures 1 to 4 An embodiment of the present invention provides an electromagnetic pen 100 , including a housing (not shown) and a pen core 11 , a magnetic induction component 12 , a clamping member 13 , an elastic member 14 , a transmission member 15 , a pressure sensor 17 and a circuit board 19 disposed in the housing.

[0017] In this embodiment, the pen refill 11 is disposed inside the magnetic sensing component 12 and the clamping member 13 and includes a fixed end 111 and a writing end 113. The direction extending from the writing end 113 toward the fixed end 111 is defined as a first direction. The magnetic sensing component 12, the clamping member 13, the elastic member 14, the transmission member 15, and the pressure sensor 17 are coaxially arranged in sequence along the first direction. The circuit board 19 is disposed behind the pressure sensor 17 along the first direction. The electromagnetic pen further includes a front compartment 21, a rear compartment 23, and a fixing base 25. The front compartment 21, the rear compartment 23, and the fixing base 25 are used to respectively secure and restrain each of the aforementioned components.

[0018] The pen core 11 can be replaced by plugging and unplugging from the writing end 113 of the electromagnetic pen. The fixed end 111 passes through the magnetic induction component 12 and is fixed to the clamping member 13. In this embodiment, the fixed end 111 and the inner wall of the clamping member 13 are interference fit.

[0019] The magnetic induction assembly 12 includes a magnetic core 121 having a first through-hole 1211, a wire loop 123 wound around the outer surface of the magnetic core 121, and a buffer sheath 125 having a second through-hole 1251. The buffer sheath 125 is sleeved over the magnetic core 121. The fixed end 111 of the pen refill 11 passes through the magnetic core 121 and the buffer sheath 125 through the first through-hole 1211 and the second through-hole 1251, respectively. The buffer sheath 125 is disposed between the magnetic core 121 and the front chamber 21. The provision of the buffer sheath 125 protects the magnetic core 121 and prevents damage caused by direct contact between the magnetic core 121 and the front chamber 21 during use. In this embodiment, the buffer sheath 125 may be a silicone sheath.

[0020] A clamping space 131 is defined at one end of the clamping member 13. The fixed end 111 of the refill 11 passes through the magnetic core 121 and the buffer sheath 125 and is inserted into the clamping space 131. The refill 11 forms an interference fit with the inner wall of the clamping space 131, thereby preventing significant movement of the refill 11 during writing. A retaining portion 132 is defined on the outer wall of the end of the clamping member 13 adjacent to the clamping space 131.

[0021] The front compartment 21 includes a first receiving space 211 and a second receiving space 213 distributed in sequence along the first direction. A partition wall 212 is provided between the first receiving space 211 and the second receiving space 213. A third through hole 2121 is provided on the partition wall 212. The first receiving space 211 and the second receiving space 213 are connected to each other through the third through hole 2121. One end of the magnetic core 121, which is provided with a buffer sheath 125, is accommodated in the first receiving space 211, and the buffer sheath 125 is arranged in abutment with the partition wall 212. The clamping member 13 is accommodated in the second receiving space 213, and the locking portion 132 of the clamping member is arranged in abutment with the partition wall 212. In order to better accommodate the fixing components, in this embodiment, the front compartment can be made of hard plastic.

[0022] The elastic member 14 is sandwiched between the clamping member 13 and the transmission member 15 . The transmission member 15 has a receiving cavity 151 at one end facing the elastic member 14 and a contact 153 at the other end facing away from the elastic member 14 .

[0023] The elastic member 14 is in a highly elastic state and has an umbrella-like structure, including an umbrella end 141 and a handle end 143 arranged sequentially along a first direction. The umbrella end 141 is located between the clamping member 13 and the transmission member 15, and the handle end 143 is partially or completely received in the receiving cavity 151 of the transmission member 15. In this embodiment, the elastic member 14 is a silicone particle.

[0024] The rear bin 23 includes a third receiving space 231, one end of the rear bin 23 is an open end 233, and an end surface of the open end 233 is provided with an opening 2331, which is connected to the third receiving space 231; the other end of the rear bin 23 is a closed end 235, and an installation opening 2351 and a pair of grooves 2353 are provided on the outer side wall of the rear bin 23 near the closed end 235.

[0025] The pressure sensor 17 includes a detection module 171, a reinforcement plate 173 and a flexible circuit strip 175. One end of the flexible circuit strip 175 is electrically connected to the detection module 171 and welded to one side of the reinforcement plate 173. The reinforcement plate 173 is provided to protect the detection module 171 from being easily damaged when impacted.

[0026] The fixing base 25 is mounted in the third receiving space 231 of the rear compartment 23. A fourth receiving space 251 is defined on the fixing base 25, which also includes a receiving slot 253. The detection module 171 of the pressure sensor 17 is inserted into the fourth receiving space 251 and is clamped and secured by the inner wall of the fourth receiving space 251. The reinforcing plate 173 is clamped between the fixing base 25 and the closed end 235 of the rear compartment 23. Specifically, the fixing base 25 and the pressure sensor 17 are installed together through the mounting opening 2351 into the third receiving space 231. The other end of the flexible circuit ribbon 175 of the pressure sensor 17 extends from the mounting opening 2351 and is electrically connected to the circuit board 19. The handwriting signal of the pressure sensor 17 is output to the circuit board 19 via the flexible circuit ribbon 175.

[0027] After the fixing base 25 is installed in the third receiving space 231 of the rear compartment 23, the elastic member 14 and the transmission member 15 are inserted into the third receiving space 231 from the open end 233 of the rear compartment 23. The transmission member 15 is partially received in the receiving groove 253 of the fixing base 25. When subjected to writing pressure, the contact 153 of the transmission member 15 is pushed into the fourth receiving space 251 and abuts against the detection module 171.

[0028] The open end 233 of the rear compartment 23 is inserted into the second receiving space 213 of the front compartment. The clamping member 13 is partially received in the third receiving space 231 and abuts against the canopy end 141 of the elastic member. To facilitate the sliding of the clamping member 13, a gap is provided between the retaining portion 132 of the clamping member 13 and the end surface of the open end 233 of the rear compartment 23. In this embodiment, the maximum displacement of the clamping member 13 is 0.5 mm. After the clamping member 13 reaches its maximum displacement, the retaining portion 132 abuts against the end surface of the open end 233 of the rear compartment 23.

[0029] A mounting groove 191 is formed at one end of the circuit board 19 , the rear compartment 23 is inserted into the mounting groove 191 , and the ends of the circuit board 19 on both sides of the mounting groove 191 are respectively embedded in the two grooves 2353 , thereby achieving connection between the rear compartment 23 and the circuit board 19 .

[0030] To ensure a stable connection between the front and rear compartments 21 and 23, in this embodiment, a stopper 237 is provided on the outer wall of the rear compartment 23 near its open end 233. Correspondingly, a stopper hole 215 is provided on the sidewall of the second receiving space 213 of the front compartment 21. The stopper 237 mates with the stopper hole 215 to connect the front and rear compartments 21 and 25. In this embodiment, there are two stoppers 237 and two stopper holes 215. In other embodiments, the number of stoppers 237 and stopper holes 215 is not limited. The sidewall of the stopper 237 near the front compartment 21 is formed into an inclined surface 2371, while the sidewall of the stopper 237 away from the front compartment 21 is not inclined. When the open end 233 is inserted into the second receiving space 213, the inclined surface 237 guides the stopper 237 to deform, ensuring that the open end 233 is smoothly inserted into the second receiving space 213 of the front compartment 21. When the limit block 237 has been installed in the limit hole 215, since the side wall of the limit block 237 away from the front compartment 21 is not a slope, the limit block 237 cannot withdraw along the original path, thereby preventing the open end 233 from withdrawing from the second receiving space 213, and realizing a stable connection between the front compartment 21 and the rear compartment 23.

[0031] When writing with the electromagnetic pen of this embodiment, the writing end 113 of the pen core is subjected to pressure. As the pressure gradually increases, the fixed end 111 of the pen core pushes the clamping member 13 toward the elastic member 14. The elastic member 14 absorbs some of the pressure and transmits the remaining pressure to the transmission member 15. At the same time, it pushes the transmission member 15 toward the detection module 171 of the pressure sensor, enabling the detection module 171 to detect the handwriting signal. Finally, the pressure sensor 17 outputs the collected handwriting signal to the circuit board 19 via the flexible circuit strip 175. The elastic member 14 is in a highly elastic state and the umbrella end 141 has a large area, which allows for sufficient contact with the clamping member 13. Therefore, it can disperse and absorb a large amount of pressure. After being deformed by force, no obvious force feedback is generated, achieving a soft contact state, making the user's handwriting feel softer.

[0032] It should be noted that, when the electromagnetic pen of this embodiment is not in writing state, there are many possible connection relationships between the clamping member 13 and the elastic member 14: there is a gap between the clamping member 13 and the elastic member 14; the clamping member 13 and the elastic member 14 are in contact but no contact stress is generated; the clamping member 13 and the elastic member 14 are in abutment with each other.

[0033] Optionally, for ease of disassembly or maintenance, an ejection hole 2317 is opened on the side wall of the rear compartment 23 , and a maintenance tool is used to eject the fixing seat 25 out of the third receiving space 231 of the rear compartment 23 through the ejection hole 2317 .

[0034] At the same time, since the pre-compression spring is eliminated, the raw material cost of the electromagnetic pen provided by the utility model is reduced and the assembly process is further simplified.

[0035] To sum up, the electromagnetic pen provided by the present invention includes a pen core, a clamping member, a transmission member and a pressure sensor; it also includes an elastic member, wherein the elastic member is clamped between the clamping member and the transmission member; the elastic member is in a highly elastic state and has an umbrella-shaped structure, one end is an umbrella surface end, and the other end is a handle end, the umbrella surface end is close to the clamping member, and the handle end is close to the transmission member.

[0036] The electromagnetic pen provided by the present invention incorporates an elastic member between the clamping member and the transmission member, preventing the pen refill from noticeably shaking while held by the clamping member. The elastic member causes the transmission member to be in contact with the pressure sensor. In this first state, the writing pressure of the pen refill is transmitted to the pressure sensor via the clamping member, the elastic member, and the transmission member. Because the elastic member is in a highly elastic state and has an umbrella-like structure, the umbrella end can effectively disperse and absorb pressure, and deformation under force does not produce noticeable force feedback, achieving a soft contact state. Compared to related technologies, the electromagnetic pen described herein has a simple structure, is easy to install, is highly sensitive, and provides a soft writing feel.

[0037] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electromagnetic pen, comprising: Pen refills; A clamping piece, wherein one end of the clamping piece is provided with a clamping space for fixing the pen core; A transmission member, wherein one end of the transmission member is provided with a receiving cavity; a pressure sensor, configured to receive the pressure transmitted by the transmission member; It is characterized in that the electromagnetic pen further includes an elastic member, which is clamped between the clamping member and the transmission member and fixed in the receiving cavity of the transmission member, and the elastic member is in a high elastic state.

2. The electromagnetic pen according to claim 1, characterized in that: The elastic member has an umbrella-shaped structure, one end of the elastic member is an umbrella end, and the other end is a handle end. The umbrella end is located between the clamping member and the transmission member, and part or all of the handle end is accommodated in the accommodating cavity of the transmission member.

3. The electromagnetic pen according to claim 1, characterized in that: The writing pressure of the pen core is transmitted to the pressure sensor through the clamping member, the elastic member and the transmission member in sequence.

4. The electromagnetic pen according to claim 3, characterized in that: It also includes a magnetic induction component, which is sleeved on the pen core.

5. The electromagnetic pen according to claim 4, characterized in that: The magnetic induction component includes a magnetic core, a wire loop wound on the magnetic core, and a buffer sleeve. The magnetic core is provided with a first through hole; the buffer sleeve is sleeved on one end of the magnetic core close to the clamping piece, and the buffer sleeve is provided with a second through hole; one end of the pen core passes through the first through hole and the second through hole in sequence and is fixed by the clamping piece.

6. The electromagnetic pen according to claim 5, characterized in that: It also includes a front compartment, which has a first receiving space and a second receiving space. Part of the magnetic induction component is received in the first receiving space, and the clamping member is received in the second receiving space. The first receiving space and the second receiving space are connected by a third through hole.

7. The electromagnetic pen according to claim 6, characterized in that: It also includes the rear warehouse, where A limit block is provided on the side wall of one end of the rear bin close to the front bin, and a limit hole is provided on the side wall of the front bin close to one end of the rear bin. The limit block is adapted to the limit hole to ensure the connection stability between the front bin and the rear bin.

8. The electromagnetic pen according to claim 7, characterized in that: It also includes a fixing base, the rear compartment has a third receiving space, and the fixing base is received in the third receiving space; the fixing base has a receiving groove and a fourth receiving space, the transmission member is received in the receiving groove, and the pressure sensor is received in the fourth receiving space.

9. The electromagnetic pen according to claim 8, characterized in that: A mounting opening is provided on a side wall of one end of the rear bin away from the front bin, and the mounting opening allows the fixing seat to pass freely.

10. The electromagnetic pen according to claim 9, characterized in that: It also includes a circuit board, one end of which is provided with a mounting groove; the pressure sensor includes a flexible circuit belt, and the pressure sensor is electrically connected to the circuit board through the flexible circuit belt.

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