Palm-shaped flexible touch perception sensor

Abstract

The utility model discloses a palm-shaped flexible tactile sensor, which relates to the technical field of sensors and comprises a lower-layer flexible substrate and an upper-layer flexible substrate, after the edges of the lower-layer flexible substrate and the upper-layer flexible substrate are fixedly connected, a cavity is reserved in a finger area and a palm area, and the tail part is connected with a rubber shell. A tactile sensing module and an insulating glue layer are fixed in the cavity, and the insulating glue layer is filled between the tactile sensing module and the cavity to prevent short circuit of the tactile sensing module and the cavity. The finger part and the palm part of the upper-layer flexible substrate are connected with the elastic rope, two ends of the elastic rope are fixed on the side ear bulges, self-adjustment can be realized according to the thickness of the fingers or the palm of the user, and convenient wearing is realized. Sensitive elements of the tactile sensing module are distributed at finger joints and palm center handprints, adjacent sensitive elements are connected in series through copper foils, the tail ends of the sensitive elements are connected with terminals, the terminals are packaged in a rubber shell, and current can be transmitted to the sensitive elements after the terminals are externally connected with a circuit, so that tactile sensing is achieved. The sensor is convenient to wear, high in stability and wide in application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field, concretely is a palm shape flexible touch perception sensor. BACKGROUND

[0002] At the present time when touch perception technology is continuously evolving and intelligent wearable devices are developing vigorously, the palm shape flexible touch perception sensor as the key component to realize man-machine interaction and improve the intelligent level of equipment is receiving more and more attention. It is widely used in virtual reality, robot fine operation and other fields.

[0003] In terms of wearing convenience, the existing palm shape flexible touch perception sensor design is often too complex, and the wearing process is cumbersome. Some sensors need to be assisted by additional fixing devices such as straps, buckles, etc., which not only increases the wearing time, but also reduces the user's willingness to use.

[0004] In addition, the existing sensor structure has obvious defects. The touch perception module as the core component of the sensor contains a large number of sensitive elements and circuit connections inside. However, due to the lack of effective protection measures, these sensitive elements and circuits are easily affected by external factors such as moisture, dust invasion, and improper insulation during manufacturing, which may cause short circuit failure. Once a short circuit occurs, not only will the sensor lose the touch perception function, but also the related circuit elements may be damaged, shortening the service life of the sensor. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a palm shape flexible touch perception sensor, which solves the problems raised in the above background technology.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: a palm shape flexible touch perception sensor, comprising a lower flexible substrate, an upper flexible substrate, a touch perception module, and an insulating adhesive layer, the finger part and the palm part of the upper flexible substrate are connected with a rope belt, the touch perception module is arranged in the cavity reserved after the fixed connection of the lower flexible substrate and the upper flexible substrate, and comprises a plurality of sensitive elements arranged at each joint of the finger part and the palm center fingerprint, two adjacent sensitive elements are connected in series through a copper foil, the tail end of the copper foil is fixedly connected with a terminal, and the insulating adhesive layer is filled in the area reserved between the touch perception module and the cavity.

[0007] Further, the edge of the upper surface of the lower flexible substrate is integrally connected with an inner layer boss, and the edge of the lower surface of the upper flexible substrate is integrally connected with an outer layer boss.

[0008] Further, the edges of the lower flexible substrate and the upper flexible substrate are connected after being fixed, the outer layer boss is located outside the inner layer boss, and the inner layer boss and the outer layer boss avoid overflow of the insulating adhesive layer during addition under the premise of ensuring the flatness of the edges.

[0009] Further, the upper flexible substrate is integrally connected with the side ear protrusions on both sides of the finger part and the palm part, and the two ends of the rope are fixedly connected to the surfaces of the side ear protrusions.

[0010] Further, the rope is an elastic rope, and can be self-adjusted according to the thickness of the fingers or the palm of the user, so that the user can conveniently wear the sensor.

[0011] Further, the palm-shaped flexible tactile sensing sensor further comprises:

[0012] The glue shell is packaged outside the plurality of terminals, and the tail is connected with the lower flexible substrate and the upper flexible substrate.

[0013] The palm-shaped flexible tactile sensing sensor provided by the utility model has the following beneficial effects compared with the prior art:

[0014] The palm-shaped flexible tactile sensing sensor connects the elastic rope with the finger part and the palm part of the upper flexible substrate, and has the following beneficial effects. The user does not need to perform complicated operation when wearing the sensor, only needs to simply put the hand into the elastic rope ring, and the elastic rope can be self-adjusted according to the thickness of the fingers or the palm of the user, tightly fits the hand profile, and realizes easy, fast and comfortable wearing.

[0015] In addition, the insulating adhesive layer effectively isolates the contact between the tactile sensing module and potential conductive substances in the outside world. Once the conductive substances such as water and dust invade the tactile sensing module during the use of the sensor, short circuit failure is easily caused, and the sensor is out of order or even damaged. The existence of the insulating adhesive layer completely blocks the passage of the conductive substances, and ensures the electrical insulation performance of the tactile sensing module. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a split structure schematic view of the utility model;

[0017] Figure 2 It is a structure schematic view of the upper and lower flexible substrates in the utility model;

[0018] Figure 3 It is a structure schematic view of the tactile sensing module in the utility model;

[0019] Figure 4 It is an assembly structure schematic view of the utility model;

[0020] Figure 5An assembled top view of the utility model;

[0021] Figure 6 The utility model discloses Figure 5 A cross-sectional view of A-A.

[0022] In the drawing: 1, lower flexible base; 11, inner layer boss; 2, upper flexible base; 21, rope belt; 22, side ear protrusion; 23, outer layer boss; 3, tactile perception module; 31, sensitive element; 32, copper foil; 33, terminal; 4, insulating adhesive layer; 5, glue shell. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] Please refer to Figures 1-6 The utility model provides a kind of technical solutions: a palm-shaped flexible tactile perception sensor, including lower flexible base 1 and upper flexible base 2, the edge of lower flexible base 1 and upper flexible base 2 is reserved cavity after being fixedly connected, and tail part is connected with glue shell 5, tactile perception module 3 and insulating adhesive layer 4 are respectively fixedly arranged in cavity, insulating adhesive layer 4 fills the area reserved between tactile perception module 3 and cavity, to prevent the effect of short circuit of tactile perception module 3, the finger part and palm of upper flexible base 2 are connected with rope belt 21, to facilitate user to wear the sensor;

[0025] The edge of the upper surface of lower flexible base 1 is integrally connected with inner layer boss 11, and the edge of the lower surface of upper flexible base 2 is integrally connected with outer layer boss 23; after the edge of lower flexible base 1 and upper flexible base 2 is fixedly connected, outer layer boss 23 is located outside inner layer boss 11; the setting of inner layer boss 11 and outer layer boss 23 avoids the overflow of insulating adhesive layer 4 when adding under the premise of ensuring the flatness of the edge;

[0026] The two sides of the finger part and palm part of upper flexible base 2 are integrally connected with side ear protrusion 22, and the two ends of rope belt 21 are fixedly connected to the surface of side ear protrusion 22; rope belt 21 is set as elastic rope, which can be self-adjusted according to the thickness of user's finger or palm, to ensure that the user can conveniently wear it;

[0027] The tactile sensing module 3 includes a plurality of sensitive elements 31 arranged at each joint of the fingers and the palm print, and each two adjacent sensitive elements 31 are connected in series through a copper foil 32. The tail end of the copper foil 32 is fixedly connected with a terminal 33. The plurality of terminals 33 are encapsulated outside the rubber shell 5. After external wiring, the current can be delivered to each sensitive element 31 through the terminal 33 and the copper foil 32. When the sensitive element 31 works, it can also convert the pressure change into a measurable electrical signal change, so as to realize the tactile sensing effect.

[0028] In the production of the sensor, the tactile sensing module 3 is first placed in the cavity of the lower flexible substrate 1, and the placement position is ensured to be accurate. Then, the cavity of the lower flexible substrate 1 is filled with the insulating glue layer 4. After the insulating glue layer 4 is cured and formed, the upper flexible substrate 2 is covered on the upper part of the lower flexible substrate 1. The edges of the lower flexible substrate 1 and the upper flexible substrate 2 are fixed together by hot melting. At this time, the terminal 33 is exposed at the tail. The rubber shell 5 is sleeved on the tail, so that the terminal 33 is located in the rubber shell 5. Then, riveting is performed. Finally, each rope 21 is fixed on the side ear protrusion 22 by ultrasonic welding technology, and the production is completed.

[0029] It should be noted that the sensitive element 31 adopts any one of piezoresistive material, piezoelectric material and capacitive material.

[0030] The piezoresistive material includes semiconductor material (silicon, germanium, etc.), metal nanomaterial (nanosilver wire, gold nanoparticle, etc.), carbon-based material (carbon nanotube, graphene, etc.) and conductive polymer (polyaniline, polypyrrole, etc.). When subjected to pressure, the resistance of these materials changes, and the pressure is detected by measuring the resistance change.

[0031] The piezoelectric material includes quartz crystal, piezoelectric ceramic (such as lead zirconate titanate PZT), polyvinylidene fluoride (PVDF) and its copolymer, etc. Under the action of pressure, the piezoelectric material generates electric charge, thereby realizing the conversion from pressure to electrical signal.

[0032] The capacitive material is usually composed of two electrodes and dielectric material in between. The distance between the electrodes or the dielectric constant of the dielectric material changes due to pressure change, which leads to the change of capacitance value, so as to sense the pressure.

[0033] In addition, the lower flexible substrate 1 and the upper flexible substrate 2 adopt any one of polyimide (PI), polyethylene terephthalate (PET) and polydimethylsiloxane (PDMS).

[0034] The polyimide (PI) has high heat resistance, mechanical strength and insulation performance, and good flexibility.

[0035] Polyethylene terephthalate (PET) is low in cost, has good flexibility and transparency, and is widely used in flexible electronic devices;

[0036] Polydimethylsiloxane (PDMS) has good biocompatibility, excellent flexibility, elasticity and transparency, and is often used in flexible sensors in wearable devices and biomedical fields.

[0037] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, should be covered within the protection scope of the present application.

Claims

1. A palm-shaped flexible tactile perception sensor, characterized in that, The application relates to a flexible tactile sensing glove, which comprises a lower flexible base (1), an upper flexible base (2), a tactile sensing module (3) and an insulating adhesive layer (4), the finger part and the palm part of the upper flexible base (2) are connected with a rope belt (21), the tactile sensing module (3) is arranged in a cavity reserved after the edge fixed connection of the lower flexible base (1) and the upper flexible base (2), a plurality of sensitive elements (31) are arranged at each joint of the finger part and the palm fingerprint, the two adjacent sensitive elements (31) are connected in series through a copper foil (32), the tail end of the copper foil (32) is fixedly connected with a terminal (33), and the insulating adhesive layer (4) is filled in the area reserved between the tactile sensing module (3) and the cavity.

2. The palm-shaped flexible tactile sensor according to claim 1, wherein, The edge of the upper surface of the lower flexible base (1) is integrally connected with an inner layer boss (11), and the edge of the lower surface of the upper flexible base (2) is integrally connected with an outer layer boss (23).

3. The palm-shaped flexible tactile sensor according to claim 2, wherein, After the edge fixed connection of the lower flexible base (1) and the upper flexible base (2), the outer layer boss (23) is located outside the inner layer boss (11), and the inner layer boss (11) and the outer layer boss (23) can prevent the insulating adhesive layer (4) from overflowing during the adding process under the premise of ensuring the edge flatness.

4. The palm-shaped flexible tactile sensor according to claim 1, wherein, The two sides of the finger part and the palm part of the upper flexible base (2) are integrally connected with side ear protrusions (22), and the two ends of the rope belt (21) are fixedly connected to the surfaces of the side ear protrusions (22).

5. The palm-shaped flexible tactile sensor according to claim 1, wherein, The rope belt (21) is a elastic rope, which can be self-adjusted according to the thickness of the fingers or the palm of the user, so that the user can conveniently wear the glove.

6. The palm-shaped flexible tactile sensor according to claim 1, wherein, The application further comprises: A glue shell (5) is arranged outside the plurality of terminals (33) and connected with the lower flexible base (1) and the upper flexible base (2) at the tail.

Images