A tactile assistive device for the blind

Abstract

The present invention discloses a tactile-based assistive device for the blind, which relates to the technical field related to medical instruments, including a wearable accessory. The wearable accessory is provided with a sensor module and multiple vibration feedback modules. The vibration feedback module includes a shell and a vibration generating component arranged in the shell. An elastomer is also provided in the shell. The elastomer is located at the vibration signal output end of the vibration generating component. When the vibration generating component outputs a vibration signal, it drives the elastomer to undergo elastic deformation. The present invention arranges an elastomer between the vibration signal output end of the vibration feedback mechanism and the skin of the blind person. The elastomer can undergo elastic deformation according to the tightness between the wearable accessory and the skin, so that the elastomer can basically maintain direct or indirect (through clothing) contact with the skin.

Description

Technical Field

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

[0002] As we all know, travel assistance devices are important tools that help visually impaired people travel safely and independently. These include traditional assistance tools such as canes and guide dogs, as well as smart wearable devices such as smart glasses, shoes, and accessories. These devices are equipped with lidar and ultrasonic sensor technologies and provide sound or vibration alerts to visually impaired people.

[0003] When going out, if you encounter a noisy area, the effect of the sound reminder will become worse, and it is difficult to provide better protection for the travel safety of the visually impaired. Therefore, the reminder method of sound plus vibration 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 electrical energy is provided on the side wall, a cavity is provided in the wearable accessory, two vibration bars are slidably connected in the cavity, and a vibration mechanism for warning of danger is provided on the two vibration bars, a small motor is fixedly connected to the inner side wall of the cavity, and 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 side 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. This patent has a reasonable structure, which can not only remind the blind person of obstacles 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 assistance devices for the blind, when the blind wear them, the distance between the wearable device and the skin changes in real time because the body is in motion, resulting in changes in the distance between the vibration feedback mechanism and the skin, making it difficult for each vibration feedback mechanism to provide a more accurate vibration signal, thereby misleading the blind person's judgment. Summary of the Invention

[0005] The purpose of the present invention is to provide a tactile assistive 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 includes a wearable accessory provided with a sensor module and multiple vibration feedback modules. The vibration feedback module includes a shell and a vibration generating component arranged within the shell. An elastomer is also provided within the shell. The elastomer is located at the vibration signal output end of the vibration generating component. When the vibration generating component outputs a vibration signal, it drives the elastomer 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 slidingly provided in the shell, and rings are fixedly connected to both ends of the elastomer in the length direction. The two rings are slidingly 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 portion of the elastic body facing the blind person's skin.

[0011] As mentioned above, a second rod is provided in the middle of the first rod for sliding along the output direction of the vibration signal, and one end of the second rod is hinged to the middle of the elastic body.

[0012] As mentioned above, 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, 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 is provided with a curved portion at one end away from the end thereof being swungly 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. The sliding direction of the first plate body in the shell is parallel to the output direction of the vibration signal. A third plate body is fixedly connected to one of the first plates, and the vibration generating assembly is arranged on the third plate body. A first friction roller is installed on the swing axis of the first plate body, and a second friction roller is provided between the second plate body 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 elastically deform 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 elastically deform, 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 following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

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

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

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

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

[0023] Figure 5 for Figure 4 A in the figure shows the enlarged structural diagram;

[0024] Figure 6 This is a schematic diagram of the exploded structure of a vibration feedback module of a tactile-based assistive device for the blind 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. Elastomer; 3. First rod; 4. Ring; 5. Protrusion; 6. Second rod; 7. First plate; 8. Bending portion; 9. Shading cloth; 10. Second plate; 11. Third plate; 12. First friction roller; 13. Second friction roller; 14. Motor; 15. Cam; 16. Third rod; 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 make those skilled in the art better understand the technical solution of the present invention, Figure 1 To the attached Figure 7 The present invention is further described in detail.

[0029] An embodiment of the present invention provides a tactile-based 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. 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 person'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 person'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 blind person's skin. This 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 based on the obstacle distance and walking route information detected by the sensor module. Specifically, the closer the obstacle is, the higher the vibration frequency and the greater the vibration intensity, thereby better alerting the blind person. In this embodiment, the wearable accessory 1 is a belt, for example. Buckles are provided at both ends of the belt, and the cloth straps connected to the buckles can be adjusted in length to adjust to the blind person's body size, ensuring wearability. To improve wearing comfort, the blind person can choose to wear lighter clothing between the belt and the blind person's skin. However, in the prior art, for wearable accessories 1, especially belts, the distance between the vibration feedback module on the belt and the skin of the blind person varies during walking due to the body's movement. If the vibration feedback module cannot maintain an appropriate distance from the blind person's skin, the vibration signal emitted by the vibration feedback module is difficult for the blind person to perceive clearly, thereby misleading the blind person'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 belt according to their own size, the elastic body 2 will undergo elastic deformation due to the squeezing effect of the skin. When the blind person walks, the distance between the belt and the skin changes. As 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 rebound force. Conversely, as 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 the elastic body 2 can always maintain contact with the skin when the distance between the belt and the skin changes (the contact between the elastic body 2 and the skin is indirect here and in the subsequent text, with relatively thin 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 elastically deform. 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 person.

[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 skin of the blind person, the elastomer 2 can elastically deform 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 through voice based on the vibration signal emitted by the vibration generating component; specifically, in order to improve wearing comfort, this embodiment provides a plurality of ventilation holes on the wearable accessory 1, that is, the belt, so that perspiration can be better wicked away 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 to better provide assistance for the blind person in traveling.

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

[0035] Specifically, the sliding direction of the first rod 3 is parallel to the output direction of the vibration signal, and the sliding direction of the two rings 4 on the first rod 3 is perpendicular to the output direction of the vibration signal. The elastic body 2 is arc-shaped. Under the action of its own elastic force, it can drive the two rings 4 at both ends 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 its maximum. When the elastic body 2 is squeezed by the skin, the bending degree of the elastic body 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 3. The movement of the first rod 3 drives the elastic body 2 to squeeze the skin to provide a vibration feedback signal. The first rod 3 jointly applies a force to the two ends of the elastic body 2. When the elastic body 2 undergoes elastic deformation, it will drive the two rings 4 at both ends to move away from each other, guiding the elastic deformation of the elastic body 2, thereby avoiding irregular bending of the elastic body 2 during elastic deformation, causing damage.

[0036] Preferably, a protrusion 5 is provided in the middle part of the side of the elastomer 2 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 so as to slide along the direction in which the vibration signal is output, 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 exert an extrusion effect on the elastic body 2 in different directions, making it difficult for the elastic body 2 to elastically deform at the center position on the first rod 3. This will cause the skin position where the vibration signal acts each time to be relatively dispersed, which may easily cause signal interference to the blind person and lead to misjudgment. Therefore, in this embodiment, the second rod 6 is provided in the center position of the first rod 3 so as to slide along the direction in which the vibration signal is output, 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 in which the vibration signal is output, thereby limiting the movement of the elastic body 2 in the length direction of the first rod 3. 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 extrusion of the skin without changing its basic position, thereby allowing the side of the elastic body 2 facing the skin to better utilize the changes in the skin shape.

[0038] Preferably, two first plates 7 are swingably arranged in the shell 21, and 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 above 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 with a first elastic member 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 in a relative direction on the clothes, so that the surface of the clothes corresponding to the elastic body 2 can basically maintain a planar structure, that is, in 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 can be further swing-set on the shell 21 parts corresponding to the two ends in the length direction of the first rod 3 (not specifically shown in the figure), 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, the first plate 7 is provided with a curved portion 8 at the end away from the end thereof being swingably connected to the shell 21, and the surface of the curved portion 8 facing the skin of the blind person is rough; specifically, in order to increase the frictional force when the first plate 7 pushes the clothes and reduce the force of the first plate 7 on the skin, this embodiment arranges the curved portion 8 at the end of the first plate 7 that is not hinged to the shell 21, and the surface of the curved portion 8 in contact with the clothes is rough. Compared with the sharp corners, the curved portion 8 can reduce the force on the skin when in contact with the skin. In addition, due to the effect of the clothes, the first plate 7 can push the clothes more smoothly.

[0041] Preferably, an elastic shielding cloth 9 is arranged on the side of the shell 21 facing the blind person's skin, 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 slidingly provided in the shell 21 at positions corresponding to the two ends of the first rod 3. 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. 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. 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, when the belt is worn, 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 force between the elastic body 2 and the skin, an appropriate force should be maintained between the elastic body 2 and the skin. 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 housing 21. Therefore, in this embodiment, the vibration generating component is arranged in the housing 21 by sliding along the vibration signal output direction through the second plate 10 and the third plate 11, 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 transmits power through rolling friction between the first friction roller 12 and the second friction roller 13, and the second friction roller 13 and the second plate 10 also transmit power through rolling friction, that is, when the opening and closing angle between the two first plates 7 increases, the first plate 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. The second friction roller 13 drives the second plate 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 the direction away from the skin without affecting 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 the vibration signal, based on the elastic force of the elastic body 2, the end of the first rod body 3 is farthest away from the blind person's skin on the second plate body 10, 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. At this time, the skin still has an squeezing effect on the elastic body 2, and the elastic body 2 always maintains elastic potential energy. Then, between the two first plates 7, the elastic body 2 can move along with the vibration generating component in the direction away from the skin without affecting the vibration signal emitted by the vibration generating component. 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, then the elastic potential energy of the elastic body 2 is released and moves in the direction away from the skin, that is, the elastic body 2 moves as far as the vibration generating component moves. If a sliding groove is provided on the second plate 10, the end of the first rod 3 is slidably arranged in the sliding 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 sliding 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 action.

[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 person. However, the elastic deformation of the elastic body 2 provides flexible contact to the blind person'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 assembly includes a micro motor 14 fixed on the third plate 11, a cam 15 is installed at the power output end of the motor 14, and a third rod 16 is fixed to the middle of the first rod 3. The first rod 3 is slidably arranged inside the third rod 16, and the end of the third rod 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 16, and the third rod 16 drives the first rod 3 to move synchronously, and the first rod 3 pushes the elastic body 2 to elastically squeeze the skin. The third rod 16 is divided into a first section 160 fixed to the first rod 3 and a second section 161 intermittently squeezed by the cam 15. The second section 161 is installed with an insertion rod 162 on the side 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 limiting grooves 17 are provided in the axial direction on the second rod body 6. A limiting plug 18 is provided on the first section 160 for sliding along a certain radial direction. A pressure groove 19 is provided on the limiting plug 18. An extrusion rod 20 is provided for sliding in the pressure groove 19. 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 limiting plug 18 to gradually engage with a certain limiting groove 17 on the second rod body 6. That is, when the cam 15 is driven to move circumferentially, it extrudes the second section 161, including two strokes:

[0047] During the first stroke, the cam 15 squeezes the second section 161 and moves it in the direction of outputting the vibration signal. The second section 161 drives the insertion rod 162 to squeeze the second elastic member. The insertion rod 162 drives the squeezing rod 20 to squeeze the pressure groove 19. At this time, the slot corresponding to the limiting block 18 on the second rod body 6 is gradually inserted by the limiting block 18. After the limiting block 18 is fully inserted into the limiting groove 17, 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, then the second section 161 drives the first section 160 to move together along the output direction of the vibration signal, and 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 is changed to hard contact, which can better provide vibration feedback signals for the blind.

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

Claims

1. A tactile assistive 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 includes a housing and a vibration generating component arranged in the housing, and an elastic body is also arranged in the housing; 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, the elastic body is driven to undergo elastic deformation. Two first plates are swingably arranged in the housing. 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 housing. Due to the elastic force of the two first elastic members, the opening and closing angle between the two first plates tends to become smaller. The first plate is provided with a curved portion at one end thereof away from the end thereof being swungly connected to the housing, and the surface of the curved portion facing the skin of the blind person is rough; 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 to pass through.

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 prompt 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 slidingly provided in the shell, and rings are fixedly connected to both ends of the elastomer in the length direction. The two rings are arranged to slide 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 provided on the middle portion of the elastic body on the side facing the blind person's skin.

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

6. The tactile assistive device for the blind according to claim 1, characterized in that: Two second plates are slidingly provided in the shell at positions corresponding to the two ends of the first rod. 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. The vibration generating assembly is provided on the third plate. A first friction roller is installed on the swing axis of the first plate. 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.

7. The tactile assistive device for the blind according to claim 6, characterized in that: 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 farthest from the blind person's skin on the second plate.

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