Haptic feedback device

Abstract

The invention discloses a tactile feedback device which comprises a base, a supporting assembly installed on the base, a driving assembly installed on the supporting assembly and a vibration assembly installed on the base in a sliding mode and connected with the driving assembly. The vibration assembly comprises a guide rod installed on the base and a vibration piece installed on the guide rod in a sliding mode, a step part is formed on the vibration piece, the supporting assembly comprises a first fixing piece and a second fixing piece, the vibration assembly is located between the first fixing piece and the second fixing piece, and the vibration piece is located between the first fixing piece and the second fixing piece. The first fixing part is supported on the step part, the driving assembly comprises a memory alloy wire wound between the first fixing part and the second fixing part, the memory alloy wire is connected with the vibration part, and the memory alloy wire drives the vibration part to reciprocate along the guide rod when acting. According to the invention, vibration feedback can be synchronously generated, the feedback time is shortened, and the vibration response rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of haptic feedback, and particularly to a haptic feedback device. Background Art

[0002] Haptic feedback is a technology that reproduces tactile sensations for users through a series of actions such as forces or vibrations, that is, it provides feedback on corresponding gestures or touches on an electronic device. With haptic feedback technology, electronic device manufacturers can create unique personalized haptic feedback for specific interactive experiences on their devices, thereby providing users with a more valuable and realistic unique experience.

[0003] Currently, traditional haptic feedback is mostly achieved by a rotary eccentric motor (ERM). The eccentric rotary motor is provided with a rotor that is offset from the center. Using the principle of electromagnetic induction, the electromagnetic force drives the rotation of the axis, thereby driving the rotation of the eccentric or eccentric weight, and thus generating a centrifugal force that causes the rapidly rotating motor to vibrate. After the motor starts to rotate, an all-round extreme vibration experience is generated. When a positive voltage is applied, the motor rotates, and when a negative voltage is applied, it is braked. However, the use of the rotary motor has limitations. The rotary motor has inertia and requires sufficient drive to rotate quickly. Therefore, it has a slow start and a slow brake, and it is easy to produce an obvious delay feeling during repeated clicks. As a result, the vibration feedback performance of the haptic feedback device is not good.

[0004] Therefore, there is an urgent need to provide an improved haptic feedback device to overcome the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide an improved haptic feedback device, which can achieve synchronous generation of vibration feedback, shorten the feedback time, and thus improve the vibration response rate.

[0006] To achieve the above purpose, the haptic feedback device provided by the present invention includes a base, a support component mounted on the base, a drive component mounted on the support component, and a vibration component mounted on the base and connected to the drive component. Among them, the vibration component includes a guide rod mounted on the base and a vibrating member slidably mounted on the guide rod. A stepped portion is formed on the vibrating member. The support component includes a first fixing member and a second fixing member. The vibration component is located between the first fixing member and the second fixing member. The first fixing member bears on the stepped portion. The drive component includes a shape memory alloy wire wound around the first fixing member and the second fixing member. When the shape memory alloy wire actuates, it drives the vibrating member to reciprocate along the guide rod.

[0007] Compared with the prior art, the vibration assembly of the haptic feedback device of the present invention includes a guide rod mounted on the base and a vibrating member slidably mounted on the guide rod. A stepped portion is formed on the vibrating member. The vibration assembly is located between a first fixing member and a second fixing member of the support assembly. The first fixing member is carried on the stepped portion, and a shape memory alloy wire is wound around between the first fixing member and the second fixing member. When the shape memory alloy wire actuates, it can drive the vibrating member to reciprocate along the guide rod. The present invention does not need to use a magnet or an electromagnetic coil, and directly drives the vibrating member to vibrate by means of the shape memory alloy wire, greatly shortening the feedback time, so as to reach the corresponding maximum amplitude. Moreover, compared with magnets and coils, the feedback driven by the shape memory alloy wire will not have the problem of interfering with the transmission of electromagnetic wave signals.

[0008] Preferably, the driving assembly includes a first shape memory alloy wire and a second shape memory alloy wire. The first shape memory alloy wire is wound around the first fixing member, and the end of the first shape memory alloy wire is connected to the stepped portion of the vibrating member.

[0009] Preferably, one end of the second shape memory alloy wire is connected to the vibrating member, and the other end of the second shape memory alloy wire is connected to the second fixing member.

[0010] Preferably, the driving assembly further includes a buckle member. The buckle member is mounted on the first fixing member. The second shape memory alloy wire bypasses the buckle member, and both ends of the second shape memory alloy wire are respectively connected to two clamping ends of the buckle member.

[0011] Preferably, a convex block is provided on the step of the vibrating member, and the buckle member clamps the convex block.

[0012] Preferably, the vibration assembly further includes a first elastic member and a second elastic member located at both ends of the vibrating member. The first elastic member and the second elastic member respectively press between the vibrating member and the base.

[0013] Preferably, a groove adapted to the guide rod is provided below the vibrating member, so that the guide rod can slide along the groove.

[0014] Preferably, the number of the guide rods and the grooves are both two.

[0015] Preferably, after the first fixing member is carried on the stepped portion, the surface of the first fixing member is flush with the highest surface of the vibrating member. Description of the Drawings

[0016] Figure 1 It is an assembly structure diagram of the haptic feedback device of the present invention.

[0017] Figure 2This is an exploded view of the haptic feedback device of the present invention.

[0018] Figure 3 This is a top view of the haptic feedback device of the present invention.

[0019] Figure 4 This is a side view of the haptic feedback device of the present invention. Detailed implementation manners

[0020] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the detailed implementation manners of the present application in conjunction with some embodiments. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship for the purpose of facilitating the description of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0023] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0026] The tactile feedback device of the present invention will be further described below in conjunction with embodiments, but the present invention is not limited thereby. The method of the present invention aims to provide an improved tactile feedback device that can achieve synchronous generation of vibration feedback, shorten the feedback time, and thus improve the vibration response rate.

[0027] Combined with Figures 1-4 , an embodiment of the tactile feedback device 1 of the present invention includes a base 11, a support assembly 13 mounted on the base, a drive assembly 15 mounted on the support assembly 13, and a vibration assembly 17 slidably mounted on the base 11 and connected to the drive assembly 15. The vibration assembly 17 is driven to start vibrating under different states of the drive assembly 15 and slides on the base 11, thereby achieving synchronous vibration feedback.

[0028] Specifically, as Figure 2 shown, the base 11 serves as the support base of the entire device and has a bottom plate 111 and two side plates 112. Other components of the device are all housed in the space enclosed by the bottom plate 111 and the two side plates 112.

[0029] The support component 13 is provided for the driving component 15 to be installed and is installed on the base 11. Specifically, the support component 13 includes a first fixing member 131 and a second fixing member 132 arranged left and right. The first fixing member 131 abuts against one side plate 112 of the base 11, and the second fixing member 132 abuts against the other side plate 112 of the base 11. The driving component 15 is respectively connected to the first fixing member 131 and the second fixing member 132. Specifically, the driving component 15 includes a shape memory alloy wire wound between the first fixing member 131 and the second fixing member 132. The shape memory alloy wire includes a first shape memory alloy wire 151 and a second shape memory alloy wire 152. The first shape memory alloy wire 151 is wound around the first fixing member 131, and the end of the first shape memory alloy wire 151 is connected to the vibration component 17. One end of the second shape memory alloy wire 152 is connected to the vibration component 17, and the other end of the second shape memory alloy wire 152 is connected to the second fixing member 132. By the deformation of the first and second shape memory alloy wires 151 and 152, such as contraction or relaxation, the sliding of the vibration component 17 on the base 11 can be controlled.

[0030] As Figure 2 shown, in order to simplify the structure and reduce the cost, in this embodiment, the first shape memory alloy wire 151 and the second shape memory alloy wire 152 are preferably in a U-shaped structure, and their lengths are not limited. For example, the length of the second shape memory alloy wire 152 can be set to be longer, so as to ensure that its deformation length is long enough and maximize the use of space.

[0031] Specifically, the driving component 15 further includes a buckle member 153. The buckle member 153 is installed on the first fixing member 131. The second shape memory alloy wire 152 bypasses the buckle member 153, and both ends of the second shape memory alloy wire 152 are respectively connected to the two clamping ends of the buckle member 153. The two clamping ends of the buckle member 153 are connected to the vibration component 17. Specifically, the two clamping ends of the buckle member 153 can be elastically deformed to lock the vibrating member 171 of the vibration component 17. Specifically, a protrusion 1713 is provided on the step 1712 of the vibrating member 171, and the buckle member 153 clamps the protrusion. When the vibrating member 171 moves to a predetermined position along the direction of the first fixing member 131, the second shape memory alloy wire 152 relaxes, so that the buckle member 153 clamps the vibrating member 171, thereby realizing the process of pre-accumulating energy for the next vibration of the vibrating member 171, greatly shortening the energy consumption of the haptic feedback device, improving the vibration response rate of the haptic feedback device at the same time, and synchronously generating vibration feedback.

[0032] The vibration assembly 17 is disposed between the base 11 and the support assembly 13. The vibration assembly 17 includes a guide rod 172 mounted on the base 11 and a vibrating member 171 slidably mounted on the guide rod 172. Preferably, the vibration assembly 17 further includes a first elastic member 173 and a second elastic member 174 located at both ends of the vibrating member 171. The first elastic member 173 and the second elastic member 174 are respectively pressed between the vibrating member 171 and the base 11. Specifically, the guide rod 172 is provided below the vibrating member 171. A groove 1711 adapted to the guide rod 172 is provided below the vibrating member 171. Thus, the vibrating member 171 can slide left and right along the guide rod 172. Preferably, the number of the guide rods 172 and the grooves 1711 is two respectively for better sliding. The first elastic member 173 and the second elastic member 174 are respectively located at both ends of the vibrating member 171, so that the vibrating member 171 can reciprocate on the guide rod 172, thereby realizing vibration. Specifically, a stepped portion 1712 is formed on the vibrating member 171. The first fixing member 131 is carried on the stepped portion 1712. And after installation, the surface of the first fixing member 131 is flush with the highest surface of the vibrating member 171, making the structure more compact and the volume smaller. Specifically, one end of the first shape memory alloy wire 151 is connected to the stepped portion 1712 of the vibrating member 171, and the other end is connected to the first fixing member 131. Based on this setting,

[0033] When the first shape memory alloy wire 151 contracts, the first shape memory alloy wire 151 can drive the vibrating member 171 to move in the direction of the first fixing member 131 to a predetermined position, and at the same time compress the first elastic member 173, thereby realizing energy storage, and further realizing the rapid start of vibration of the vibrating member 171. When the vibrating member 171 reaches the predetermined position, the first shape memory alloy wire 151 is controlled to relax, and the first elastic member 173 immediately returns to its original state, so that the vibrating member 171 moves in the direction of the second fixing member 132 and compresses the second elastic member 174. When the second elastic member 174 returns to its original state, the vibrating member 171 moves in the direction of the first fixing member 131 again to drive and compress the first elastic member 173. Thus, the vibrating member 171 reciprocates under the action of the first elastic member 173 and the second elastic member 174, thereby improving the vibration response rate of the haptic feedback device, and thus realizing synchronous generation of vibration feedback.

[0034] The following combines Figures 1-4 to describe the working process of the haptic feedback device of the present invention.

[0035] The haptic feedback device 1 in the embodiment of the present invention can be applied to electronic devices such as mobile phones, smart watches and tablets. When the electronic device receives an instruction such as a call or an alarm that requires vibration reminder, the haptic feedback device gives a vibration reminder. When it is necessary to stop vibrating, the haptic feedback device is in a standby state.

[0036] When the haptic feedback device 1 is in the standby state, at this time, since the buckle member 153 locks the vibrating member 171 and the second elastic member 173 is compressed, the haptic feedback device has completed the energy storage work in advance. When receiving an instruction for vibration reminder, the first shape memory alloy wire 151 is powered to make it contract, thereby pulling open the opening of the buckle member 153 to release the vibrating member 171 locked in the standby state. After the vibrating member 171 is released, by controlling the energization and de-energization of the second shape memory alloy wire 152, energy is provided for the reciprocating vibration of the vibrating member 171, so that the vibrating member 171 can continuously reciprocate under the action of the first elastic member 173 and the second elastic member 174 to achieve the vibration feedback of the haptic feedback device.

[0037] When the haptic feedback device 1 completes the vibration feedback, the power supply to the first shape memory alloy wire 151 is stopped to make it relax, so that the opening of the buckle member 153 returns to its original state. When the vibrating member 171 moves to a predetermined position again, the buckle member 153 locks the vibrating member 171 again and compresses the first elastic member 173 at the same time, thereby storing energy in advance for the next vibration of the vibrating member 171.

[0038] In summary, the haptic feedback device of the present invention does not need to use magnets or electromagnetic coils, and directly drives the vibrating member to vibrate by means of shape memory alloy wires, greatly shortening the feedback time, so as to reach the corresponding maximum amplitude. Moreover, compared with magnets and coils, the feedback driven by shape memory alloy wires will not have the problem of interfering with the transmission of electromagnetic wave signals.

[0039] The above-disclosed are only the preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited by this. Therefore, the equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A haptic feedback device, comprising a base, a support assembly mounted on the base, a drive assembly mounted on the support assembly, and a vibration assembly slidably mounted on the base and connected to the drive assembly. Characterized in that: The vibration assembly includes a guide rod mounted on the base and a vibration member slidably mounted on the guide rod. A stepped portion is formed on the vibration member. The support assembly includes a first fixing member and a second fixing member. The vibration assembly is located between the first fixing member and the second fixing member. The first fixing member bears on the stepped portion. The drive assembly includes a shape memory alloy wire wound between the first fixing member and the second fixing member. The shape memory alloy wire is connected to the vibration member. When the shape memory alloy wire actuates, it drives the vibration member to reciprocate along the guide rod.

2. The haptic feedback device according to claim 1, Characterized in that, The shape memory alloy wire includes a first shape memory alloy wire and a second shape memory alloy wire. The first shape memory alloy wire is wound around the first fixing member, and the end of the first shape memory alloy wire is connected to the stepped portion of the vibration member.

3. The haptic feedback device according to claim 2, Characterized in that, One end of the second shape memory alloy wire is connected to the vibration member, and the other end of the second shape memory alloy wire is connected to the second fixing member.

4. The haptic feedback device according to claim 2, Characterized in that: The drive assembly further includes a buckle member. The buckle member is mounted on the first fixing member. The second shape memory alloy wire bypasses the buckle member, and both ends of the second shape memory alloy wire are respectively connected to two clamping ends of the buckle member. The buckle member is connected to the vibration member.

5. The haptic feedback device according to claim 4, Characterized in that, A convex block is provided on the stepped portion of the vibration member, and the buckle member clamps the convex block.

6. The haptic feedback device according to claim 1, Characterized in that, The vibration assembly further includes a first elastic member and a second elastic member located at both ends of the vibration member. The first elastic member and the second elastic member respectively press between the vibration member and the base.

7. The haptic feedback device according to claim 1, Characterized in that, A groove adapted to the guide rod is provided below the vibration member, so that the guide rod can slide along the groove.

8. The haptic feedback device according to claim 1, Characterized in that, The number of the guide rods and the grooves are both two.

9. The haptic feedback device according to claim 1, Characterized in that, After the first fixing member bears on the stepped portion, the surface of the first fixing member is flush with the highest surface of the vibration member.

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