Blind person auxiliary device based on touch sense

Abstract

The invention discloses a blind person auxiliary device based on tactile sense, and relates to the technical field related to medical appliances, the blind person auxiliary device comprises a wearing accessory, the wearing accessory is provided with a sensor module and a plurality of vibration feedback modules, each vibration feedback module comprises a shell and a vibration generation assembly arranged in the shell, and the shell is further internally provided with an elastic body; the elastic body is located at the vibration signal output end of the vibration generation assembly, and when the vibration generation assembly outputs a vibration signal, the elastic body is driven to generate elastic deformation; the elastic body is arranged between the vibration signal output end of the vibration feedback mechanism and the skin of the blind person, and the elastic body can elastically deform according to the tightness between the wearing accessory and the skin, so that the elastic body can basically keep direct or indirect contact with the skin (across clothes) all the time.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a tactile auxiliary device for the blind. Background Art

[0002] As is known to all, travel assistance devices for the blind are important tools to help visually impaired people travel safely and independently, such as traditional assistance tools: canes, guide dogs, etc.; smart wearable devices: smart glasses, shoes, wearable accessories, etc., equipped with laser radar sensor technology, ultrasonic sensor technology, and reminding visually impaired people through sound or vibration.

[0003] When going out, if you encounter a noisy area, the effect of the sound reminder will be poor, and it is difficult to provide better protection for the travel safety of the visually impaired. Therefore, through the reminder method of sound plus vibration, it can better provide safety guarantees for the travel of the visually impaired. For example, the patent with announcement number CN214232002U and announcement date on September 21, 2021, named "A wearable device for intelligently assisting the blind to avoid obstacles" includes a wearable accessory, a wearable accessory buckle is provided on the wearable accessory, and a charging port is provided on the upper end surface of the wearable accessory buckle. An energy storage mechanism for storing electric energy is provided on the side wall, a cavity is provided in the wearable accessory, two vibration bars are slidably connected in the cavity, a vibration mechanism for warning danger is provided on the two vibration bars, a small motor is fixedly connected to the inner wall of the cavity, a transmission mechanism for triggering the vibration mechanism is provided on the output shaft of the small motor, a plurality of infrared sensors with different inclination angles are provided on the buckle of the wearable accessory, a controller is fixedly connected to the inner wall of the cavity, a sound generator is fixedly connected in the cavity, and a trigger mechanism for triggering the sound generator is provided in the transmission mechanism. The patent has a reasonable structure, which can not only remind the blind person that there is an obstacle ahead through sound, but also further remind the blind person to avoid obstacles through vibration.

[0004] The shortcoming of the existing technology is that for wearable travel assist devices for the blind, when the blind wear the devices, their bodies are in motion, and the distance between the wearable device and the skin changes in real time, causing the distance between the vibration feedback mechanism and the skin to change, making it difficult for each vibration feedback mechanism to provide a more accurate vibration signal, thereby misleading the blind's judgment. Summary of the invention

[0005] The purpose of the present invention is to provide a tactile auxiliary device for the blind to solve the technical problems in the related art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A tactile-based assistive device for the blind comprises a wearable accessory, wherein the wearable accessory is provided with a sensor module and a plurality of vibration feedback modules, wherein the vibration feedback module comprises a shell and a vibration generating component arranged in the shell, wherein an elastomer is further provided in the shell; the elastomer is located at a vibration signal output end of the vibration generating component, and when the vibration generating component outputs a vibration signal, the elastomer is driven to undergo elastic deformation.

[0008] As mentioned above, the wearable accessory is provided with a plurality of ventilation holes; and is also provided with a voice prompt module, which reminds the blind person through voice based on the vibration signal emitted by the vibration generating component.

[0009] As mentioned above, a first rod body is slidably provided in the shell, and rings are fixedly connected to both ends of the elastomer in the length direction. The two rings are slidably arranged in the length direction of the first rod body. Based on the elastic force of the elastomer, the two rings tend to approach each other. The first rod body drives the elastomer to squeeze the skin of the blind person based on the vibration of the vibration generating component.

[0010] As mentioned above, a protrusion is provided on the middle part of the elastic body facing the blind person's skin.

[0011] In the above, a second rod body is slidably provided at the middle part of the first rod body along the output direction of the vibration signal, and one end of the second rod body is hinged to the middle part of the elastic body.

[0012] As mentioned above, two first plates are swingably arranged in the shell, the two first plates are arranged in a trumpet shape in the width direction of the wearable accessory, and a first elastic member is provided at the swinging connection between the first plate and the shell. Based on the elastic force of the two first elastic members, the opening and closing angle between the two first plates tends to become smaller.

[0013] As mentioned above, the first plate body is provided with a curved portion at one end away from the end thereof being swingably connected to the shell, and the surface of the curved portion facing the skin of the blind person is rough.

[0014] As mentioned above, an elastic shielding cloth is arranged on the side of the shell facing the blind person's skin, and the shielding cloth is provided with holes for the elastic body and the first plate to pass through.

[0015] As mentioned above, two second plates are slidably provided in the shell at positions corresponding to the two ends of the first rod body, and the sliding direction of the first plate in the shell is parallel to the output direction of the vibration signal. A third plate is fixedly connected to one of the first plates, and the vibration generating assembly is arranged on the third plate. A first friction roller is installed on the swing axis of the first plate, and a second friction roller is provided between the second plate and the corresponding first friction roller; the change in the opening and closing angle between the two first plates is proportional to the change in the distance between the vibration generating assembly and the skin of the blind person.

[0016] As mentioned above, the end of the first rod is slidably connected to the second plate at the corresponding position. When the vibration generating component does not output a vibration signal, based on the elastic force of the elastic body, the end of the first rod is located on the second plate at the farthest distance from the blind person's skin.

[0017] The beneficial effect of the present invention is that by arranging an elastomer between the vibration signal output end of the vibration feedback mechanism and the skin of the blind person, the elastomer can be elastically deformed according to the tightness between the wearable accessory and the skin, so that the elastomer can basically always maintain direct or indirect (through clothing) contact with the skin. When the sensor module transmits a signal to the vibration feedback module, the vibration signal of the vibration feedback module is output from the output end to drive the elastomer to undergo elastic deformation, so that the blind person can better make judgments based on the elastic deformation signal of the elastomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a tactile auxiliary device for the blind provided in an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall three-dimensional structure of a vibration feedback module of a tactile-based blind assistive device provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the internal three-dimensional structure of a vibration feedback module of a tactile-based blind assistive device provided in an embodiment of the present invention;

[0022] Figure 4 A schematic cross-sectional structure diagram of a vibration feedback module of a tactile-based blind assistive device provided in an embodiment of the present invention;

[0023] Figure 5 for Figure 4 A is an enlarged structural diagram;

[0024] Figure 6 It is a schematic diagram of the exploded structure of a vibration feedback module of a tactile-based blind assistive device provided in an embodiment of the present invention;

[0025] Figure 7 for Figure 6 The enlarged structural diagram at B in FIG.

[0026] Description of reference numerals:

[0027] 1. Wearable accessory; 2. Elastic body; 3. First rod body; 4. Ring; 5. Protrusion; 6. Second rod body; 7. First plate body; 8. Bending part; 9. Shading cloth; 10. Second plate body; 11. Third plate body; 12. First friction roller; 13. Second friction roller; 14. Motor; 15. Cam; 16. Third rod body; 160. First section; 161. Second section; 162. Insert rod; 17. Limiting groove; 18. Limiting plug; 19. Pressure groove; 20. Extrusion rod; 21. Shell. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, Figure 1 To Attachment Figure 7 The present invention is further described in detail.

[0029] An embodiment of the present invention provides a tactile assistive device for the blind, including a wearable accessory 1, on which a sensor module and multiple vibration feedback modules are provided. The vibration feedback module includes a shell 21 and a vibration generating component arranged in the shell 21, and an elastomer 2 is also provided in the shell 21; the elastomer 2 is located at the vibration signal output end of the vibration generating component, and when the vibration generating component outputs a vibration signal, it drives the elastomer 2 to undergo elastic deformation.

[0030] Specifically, the wearable accessories 1 used to assist the blind in avoiding obstacles during travel include smart guide glasses, headbands, bracelets, vests, belts, etc. In order to help the blind avoid obstacles during travel, these wearable accessories 1 are basically equipped with a sensor module, which is used to detect the distance of obstacles and walking route information in the blind's surrounding environment. It is usually composed of one or more of ultrasonic sensors, infrared sensors or lidar sensors, which can detect the distance of obstacles in the blind's surrounding environment in real time (the specific working principles of the sensors mentioned in the article are all existing technologies and will not be described in detail here). The vibration feedback module is usually composed of a vibration motor 14 (this is existing technology and its working principle will not be described in detail here). ) provides a vibration signal to act on the skin of the blind, which also includes a control module, which is electrically connected to the sensor module and the vibration feedback module, and is used to control the vibration frequency and intensity of the vibration feedback module according to the obstacle distance and walking route information detected by the sensor module, that is, the closer the obstacle distance is, the higher the vibration frequency and the greater the vibration intensity, so as to better remind the blind. In this embodiment, the wearable accessory 1 takes a belt as an example, and buckles are provided at the connection points at both ends of the belt. The cloth belt connected to the buckle can be adjusted in length to adjust according to the body size of the blind to ensure the stability of wearing. In order to improve the wearing comfort, the blind can choose to wear lighter clothes between the belt and the skin of the blind. However, in the prior art, for the wearable accessory 1, especially the belt, when the blind walks, the body is in a state of motion, and the distance between the vibration feedback module on the belt and the skin changes. If the vibration feedback module cannot maintain a suitable distance from the blind's skin, the vibration signal emitted by the vibration feedback module is difficult for the blind to perceive clearly, thereby misleading the blind's judgment.

[0031] Therefore, in this embodiment, an elastic body 2 is arranged at the vibration signal output end of the vibration generating component. When a blind person wears the belt and adjusts the wearing process according to his own size, the elastic body 2 will undergo elastic deformation based on the squeezing effect of the skin. When the blind person walks, the distance between the belt and the skin changes. When the distance increases, the squeezing effect of the skin on the elastic body 2 decreases, and the elastic body 2 rebounds toward the skin under the action of its own resilience. On the contrary, when the distance between the belt and the skin decreases, the squeezing effect of the skin on the elastic body 2 increases, and the deformation of the elastic body 2 increases. It can be seen that when the distance between the belt and the skin changes, the elastic body 2 can always maintain contact with the skin (the contact between the elastic body 2 and the skin is indirect contact here and in the subsequent text, and there is a relatively thin piece of clothing between the two). When the vibration generating component sends a vibration signal based on the signal of the sensor module, the vibration signal drives the elastic body 2 to undergo elastic deformation. The elastic body 2 contacts the skin, and the elastic deformation action of the elastic body 2 is transmitted to the skin, thereby providing a better vibration feedback signal for the blind.

[0032] The beneficial effect of this embodiment is that by arranging the elastomer 2 between the vibration signal output end of the vibration feedback mechanism and the blind person's skin, the elastomer 2 can be elastically deformed according to the tightness between the wearable accessory 1 and the skin, so that the elastomer 2 can basically always maintain direct or indirect (through clothing) contact with the skin. When the sensor module transmits a signal to the vibration feedback module, the vibration signal of the vibration feedback module is output from the output end to drive the elastomer 2 to undergo elastic deformation, so that the blind person can better make judgments based on the elastic deformation signal of the elastomer 2.

[0033] Preferably, the wearable accessory 1 is provided with a plurality of ventilation holes; a voice prompt module is also provided (this is a prior art and is not specifically shown in the figure), which reminds the blind person by voice based on the vibration signal emitted by the vibration generating component; specifically, in order to improve wearing comfort, the present embodiment provides a plurality of ventilation holes on the wearable accessory 1, that is, the belt, so that perspiration can be better wicked when the weather is hot, and further, a voice prompt module is also provided on the belt, and when the vibration generating component emits a vibration signal, the voice prompt module can synchronously emit a prompt sound, so as to better provide assistance for the blind person in traveling.

[0034] Preferably, a first rod body 3 is slidably provided in the shell 21, and rings 4 are fixedly connected to both ends of the elastomer 2 in the length direction. The two rings 4 are slidably arranged in the length direction of the first rod body 3. Based on the elastic force of the elastomer 2, the two rings 4 tend to approach each other. The first rod body 3 drives the elastomer 2 to squeeze the skin of the blind person based on the vibration of the vibration generating assembly.

[0035] Specifically, the sliding direction of the first rod body 3 is parallel to the output direction of the vibration signal, and the sliding direction of the two rings 4 on the first rod body 3 is perpendicular to the output direction of the vibration signal. The elastic body 2 is in an arc shape. Under the action of its own elastic force, the two rings 4 at both ends can be driven to approach each other, that is, when the elastic body 2 is not squeezed by the skin, the bending degree of the elastic body 2 is more obvious, and its bending arc is at the maximum. When the elastomer 2 is squeezed by the skin, the bending degree of the elastomer 2 gradually becomes less obvious, and its bending arc is getting smaller. The two rings 4 are moving away from each other. At this time, the vibration signal emitted by the vibration generating component acts on the first rod body 3. The movement of the first rod body 3 drives the elastomer 2 to squeeze the skin to provide a vibration feedback signal. The first rod body 3 jointly applies a force to the two ends of the elastomer 2. When the elastomer 2 undergoes elastic deformation, the two rings 4 at both ends will be driven to move away from each other, guiding the elastic deformation of the elastomer 2, thereby avoiding irregular bending and damage when the elastomer 2 undergoes elastic deformation.

[0036] Preferably, a protrusion 5 is provided in the middle part of the elastomer 2 on the side facing the skin of the blind person; specifically, the volume of the protrusion 5 is smaller than the volume of the elastomer 2. When the vibration signal acts on the elastomer 2, the intensity of the effect applied to the skin at the position where the protrusion 5 is located is greater, thereby better providing a vibration feedback signal for the blind person.

[0037] Furthermore, a second rod 6 is provided in the middle of the first rod 3 for sliding along the direction of output of the vibration signal, and one end of the second rod 6 is hinged to the middle of the elastic body 2; specifically, when a blind person walks, due to the movement of the body, the skin will produce squeezing effects in different directions on the elastic body 2, which makes it difficult for the elastic body 2 to be elastically deformed at the center position on the first rod 3, which will cause the skin position where the vibration signal acts each time to be relatively scattered, which is easy to cause signal interference to the blind person and lead to misjudgment. Therefore, in this embodiment, the second rod 6 is slidably provided at the center position of the first rod 3 along the direction of output of the vibration signal, and one end of the second rod 6 is hinged to the center position of the elastic body 2 away from the skin. The second rod 6 can only move in the direction of output of the vibration signal, which restricts the movement of the elastic body 2 in the length direction of the first rod 3, and the hinge mode of the second rod 6 and the elastic body 2 is a spherical hinge, that is, the elastic body 2 can undergo a certain degree of tilted elastic deformation under the squeezing effect of the skin without changing the basic position, so that the side of the elastic body 2 facing the skin can better use the changes in the skin shape.

[0038] Preferably, two first plates 7 are swingably arranged in the shell 21, the two first plates 7 are arranged in a trumpet shape in the width direction of the wearable accessory 1, and a first elastic member is provided at the swing connection between the first plate 7 and the shell 21. Based on the elastic force of the two first elastic members, the opening and closing angle between the two first plates 7 tends to become smaller.

[0039] Specifically, it can be seen from the aforementioned embodiments that there is clothing between the elastic body 2 and the skin. Then, while the clothing provides wearing comfort, there will also be other problems. That is, if wrinkles and stacks appear between the elastic body 2 and the skin, since the clothing has a certain deformation ability and buffering effect, the elastic deformation force of the elastic body 2 may be weakened by the buffering of the wrinkled and stacked clothing. To avoid this situation, in this embodiment, a pair of first plates 7 are swingably arranged on the shell 21. The two first plates 7 are arranged in a trumpet shape. The elastic body 2 is located between the two first plates 7, and each first plate 7 is provided at the swing connection with the shell 21. Under the elastic force of the two first elastic members, the opening and closing angle between the two first plates 7 tends to always become smaller. That is, when the belt is worn, due to the squeezing effect of the skin, the opening and closing angles of the two first plates 7 become larger, and in this process, the ends of the two first plates 7 that are not connected to the shell 21 will produce a pushing effect on the clothes in a relative direction, so that the surface of the clothes corresponding to the elastic body 2 can basically maintain a planar structure, that is, during the process of the opening and closing angle between the two first plates 7 becoming larger, the clothes corresponding to the elastic body 2 are flattened in the width direction of the belt. Therefore, in an optional embodiment, two first plates 7 (not specifically shown in the figure) can be swingably set on the shell 21 parts corresponding to the two ends of the length direction of the first rod 3, and the first elastic member is also arranged at the swing axis position. In this case, the clothes around the elastic body 2 can be flattened, thereby better reducing the degree to which the clothes weaken the vibration feedback signal.

[0040] Preferably, a bending portion 8 is provided at one end of the first plate body 7 away from its swing connection with the shell 21, and the surface of the bending portion 8 facing the skin of the blind person is rough; specifically, in order to increase the friction force when the first plate body 7 pushes clothes and reduce the force of the first plate body 7 on the skin, this embodiment arranges the bending portion 8 at the end of the first plate body 7 that is not hinged to the shell 21, and the surface of the bending portion 8 in contact with clothes is rough. Compared with the edges and corners, the bending portion 8 can reduce the force on the skin when in contact with the skin. In addition, due to the effect of clothes, the first plate body 7 can push clothes more smoothly.

[0041] Preferably, an elastic shielding cloth 9 is arranged on the side of the shell 21 facing the skin of the blind person, and the shielding cloth 9 is provided with holes for the elastomer 2 and the first plate 7 to pass through; specifically, the shielding cloth 9 is in elastic contact with the elastomer 2 and the first plate 7, and when the position of the elastomer 2 or the first plate 7 changes, the shielding cloth 9 can follow the elastic change, so that the sealing and dustproof effect in the shell 21 can be effectively improved, and the shielding cloth 9 is between the shell 21 and the skin, which can avoid overcoming direct contact with the skin, thereby improving wearing comfort.

[0042] Furthermore, two second plates 10 are slidably provided in the shell 21 at positions corresponding to the two ends of the first rod 3, and the sliding direction of the first plate 7 in the shell 21 is parallel to the output direction of the vibration signal. A third plate 11 is fixedly connected to one of the first plates 7, and the vibration generating assembly is arranged on the third plate 11. A first friction roller 12 is installed on the swing axis of the first plate 7, and a second friction roller 13 is provided between the second plate 10 and the corresponding first friction roller 12; the change in the opening and closing angle between the two first plates 7 is proportional to the change in the distance between the vibration generating assembly and the skin of the blind person.

[0043] Specifically, during the wearing process of the belt, the closer the distance between the belt and the skin is, the larger the opening and closing angle of the two first plates 7 is. Therefore, in order to avoid an increase in the degree of force between the elastic body 2 and the skin, the elastic body 2 and the skin should maintain a suitable force. In this way, when the opening and closing angle of the two first plates 7 is larger, the elastic body 2 should also move a distance away from the skin in the shell 21. Therefore, in this embodiment, the vibration generating component is arranged in the shell 21 through the second plate 10 and the third plate 11 in the direction of outputting the vibration signal, and a first friction roller 12 is arranged on the swing axis of the first plate 7, and a second friction roller 12 is arranged between the first friction roller 12 and the second plate 10. The friction roller 13, the first friction roller 12 and the second friction roller 13 transmit power by rolling friction, and the second friction roller 13 and the second plate body 10 also transmit power by rolling friction, that is, when the opening and closing angle between the two first plates 7 increases, the first plate body 7 drives the first friction roller 12 to rotate, and the second friction roller 13 rotates in the direction opposite to the rotation direction of the first friction roller 12, and the second friction roller 13 drives the second plate body 10 to move in the opposite direction of the vibration signal output direction through friction, so that when the opening and closing angle between the two first plates 7 increases, the vibration generating component moves in the direction away from the skin, so that the elastic body 2 can In order to move along with the vibration generating component in a direction away from the skin, and not affect the vibration signal emitted by the vibration generating component, the elastic body 2 can undergo elastic deformation to transmit the vibration feedback signal to the skin; in a preferred embodiment, the end of the first rod body 3 is slidably connected to the second plate body 10 at the corresponding position. When the vibration generating component does not output a vibration signal, based on the elastic force of the elastic body 2, the end of the first rod body 3 is located on the second plate body 10 farthest from the blind person's skin, that is, when the position of the vibration generating component remains unchanged, the opening and closing angles of the two first plates 7 do not change, and at this time the skin still has an extrusion effect on the elastic body 2, and the elastic body 2 always maintains elastic potential energy, so between the two first plates 7, the elastic body 2 is in contact with the skin of the blind person. When the opening and closing angle between the plates 7 increases, the vibration generating component moves in the opposite direction of the vibration signal output direction, and the force exerted by the vibration generating component on the first rod 3 disappears, and the elastic potential energy of the elastic body 2 is released, and it moves away from the skin. That is, the elastic body 2 moves as far as the vibration generating component moves. If a slide groove is provided on the second plate 10, the end of the first rod 3 is slidably arranged in the slide groove. When the vibration generating component does not output a vibration signal, based on the elastic force of the elastic body 2, the end of the first rod 3 is at the end of the slide groove farthest from the skin. Subsequently, when the vibration generating component generates a vibration signal, the elastic body 2 can also undergo elastic deformation based on the vibration effect.

[0044] The change in the opening and closing angle between the two first plates 7 is proportional to the change in the distance between the vibration generating component and the skin of the blind person.

[0045] In the aforementioned embodiment, the elastic body 2 is elastically deformed by the vibration signal, thereby generating a vibration feedback signal for the blind. However, the elastic deformation of the elastic body 2 provides flexible contact to the blind's skin. For some blind people whose skin perception is not sensitive, the vibration feedback signal may not be perceived or clear.

[0046] Therefore, in a further embodiment, the vibration generating component includes a micro motor 14 fixed on the third plate body 11, a cam 15 is installed at the power output end of the motor 14, a third rod body 16 is fixed to the middle part of the first rod body 3, the first rod body 3 is slidably arranged inside the third rod body 16, and the end of the third rod body 16 facing the cam 15 is a spherical structure. When the cam 15 is driven to rotate circumferentially, the cam 15 can intermittently produce an extrusion effect on the third rod body 16, the third rod body 16 drives the first rod body 3 to move synchronously, and the first rod body 3 pushes the elastic body 2 to elastically squeeze the skin, and the third rod body 16 is divided into a first section 160 fixed to the first rod body 3 and a second section 161 intermittently squeezed by the cam 15, and an insertion rod 162 is installed on the side of the second section 161 away from the cam 15, and the insertion rod 162 is slidably inserted into the first section 160 , and in the sliding direction, a second elastic member is provided between the insertion rod 162 and the first section 160. Based on the elastic force of the second elastic member, the second section 161 tends to always move away from the first section 160. A plurality of limit grooves 17 are provided in the axial direction on the second rod body 6. A limit plug 18 is provided on the first section 160 for sliding along a certain radial direction. A pressure groove 19 is provided on the limit plug 18. An extrusion rod 20 is provided in the pressure groove 19 for sliding. The extrusion rod 20 is fixed to the insertion rod 162. The pressure groove 19 is arranged obliquely. During the movement of the extrusion rod 20 along the output direction of the vibration signal, the extrusion rod 20 generates an extrusion force on the pressure groove 19. The extrusion force causes the limit plug 18 to be gradually plugged into a certain limit groove 17 on the second rod body 6. That is, during the circumferential movement of the cam 15, when it extrudes the second section 161, it includes two strokes:

[0047] In the first stroke, the cam 15 squeezes the second section 161 to move along the vibration signal output direction, the second section 161 drives the insertion rod 162 to squeeze the second elastic member, and the insertion rod 162 drives the extrusion rod 20 to squeeze the pressure groove 19. At this time, the slot corresponding to the limit block 18 on the second rod body 6 will be gradually inserted by the limit block 18. After the limit block 18 and the limit groove 17 are fully inserted, the second rod body 6 cannot slide in the first section 160;

[0048] In the second stroke, the protrusion continues to squeeze the second section 161. Since the limiting plug 18 is plugged into the limiting groove 17, the second section 161 and the first section 160 cannot continue to slide relative to each other, and the second section 161 drives the first section 160 to move along the output direction of the vibration signal. The second section 161 drives the first rod 3 to move synchronously, and the first rod 3 drives the elastic body 2 to squeeze the skin. Since the second rod 6 cannot slide in the first section 160, the corresponding parts of the elastic body 2 and the second rod 6 are difficult to undergo elastic deformation. Therefore, after the elastic body 2 receives the vibration signal, the original flexible contact with the skin becomes a hard contact, which can better provide vibration feedback signals for the blind.

[0049] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the protection of the present invention.

Claims

1. A tactile auxiliary device for the blind, comprising a wearable accessory, wherein the wearable accessory is provided with a sensor module and a plurality of vibration feedback modules, characterized in that: The vibration feedback module comprises a shell and a vibration generating component arranged in the shell, and an elastic body is also arranged in the shell; The elastic body is located at the vibration signal output end of the vibration generating component. When the vibration generating component outputs the vibration signal, it drives the elastic body to undergo elastic deformation.

2. The tactile assistive device for the blind according to claim 1, characterized in that: The wearable accessory is provided with a plurality of ventilation holes; and is also provided with a voice prompting module, which reminds the blind person through voice based on the vibration signal emitted by the vibration generating component.

3. The tactile assistive device for the blind according to claim 1, characterized in that: A first rod body is slidably provided in the shell, and rings are fixedly connected to both ends of the elastomer in the length direction. The two rings are slidably arranged in the length direction of the first rod body. Based on the elastic force of the elastomer, the two rings tend to approach each other. The first rod body drives the elastomer to squeeze the skin of the blind person based on the vibration of the vibration generating component.

4. The tactile assistive device for the blind according to claim 3, characterized in that: A bulge is arranged in the middle part of the elastic body on the side facing the skin of the blind person.

5. The tactile assistive device for the blind according to claim 3, characterized in that: A second rod body is slidably disposed in the middle of the first rod body along the output direction of the vibration signal, and one end of the second rod body is hinged to the middle of the elastic body.

6. The tactile assistive device for the blind according to claim 3, characterized in that: Two first plates are swingably arranged in the shell, and the two first plates are arranged in a trumpet shape in the width direction of the wearable accessory. A first elastic member is provided at the swing connection between the first plate and the shell. Based on the elastic force of the two first elastic members, the opening and closing angle between the two first plates tends to become smaller.

7. The tactile assistive device for the blind according to claim 6, characterized in that: The first plate body is provided with a bent portion at one end away from the end thereof being swingably connected to the shell, and the surface of the bent portion facing the skin of the blind person is rough.

8. The tactile assistive device for the blind according to claim 6, characterized in that: An elastic shielding cloth is arranged on the side of the shell facing the skin of the blind person, and the shielding cloth is provided with holes for the elastic body and the first plate body to pass through.

9. The tactile assistive device for the blind according to claim 6, characterized in that: Two second plates are slidably provided in the shell at positions corresponding to the two ends of the first rod, and the sliding direction of the first plate in the shell is parallel to the output direction of the vibration signal. A third plate is fixedly connected to one of the first plates, and the vibration generating assembly is arranged on the third plate. A first friction roller is installed on the swing axis of the first plate, and a second friction roller is provided between the second plate and the corresponding first friction roller; the change in the opening and closing angle between the two first plates is proportional to the change in the distance between the vibration generating assembly and the skin of the blind person.

10. The tactile assistive device for the blind according to claim 9, characterized in that: The end of the first rod is slidably connected to the second plate at a corresponding position. When the vibration generating component does not output a vibration signal, based on the elastic force of the elastic body, the end of the first rod is farthest from the blind person's skin on the second plate.

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