CN211750822U - Dental chair armrest - Google Patents

Dental chair armrest Download PDF

Info

Publication number
CN211750822U
CN211750822U CN201922346580.0U CN201922346580U CN211750822U CN 211750822 U CN211750822 U CN 211750822U CN 201922346580 U CN201922346580 U CN 201922346580U CN 211750822 U CN211750822 U CN 211750822U
Authority
CN
China
Prior art keywords
fixed
positioning block
spring
main body
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201922346580.0U
Other languages
Chinese (zh)
Inventor
林炳刚
陈群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Yutian Medical Technology Co ltd
Original Assignee
Foshan Yutian Medical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foshan Yutian Medical Technology Co ltd filed Critical Foshan Yutian Medical Technology Co ltd
Priority to CN201922346580.0U priority Critical patent/CN211750822U/en
Application granted granted Critical
Publication of CN211750822U publication Critical patent/CN211750822U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

A dental chair armrest relates to the technical field of dental instruments, wherein a first spring is fixed at the right end of the rear side in a cavity, and an adjusting plate is fixed at the left end of the first spring; a positioning block is fixed in the middle of the left side of the adjusting plate, and the interior of the positioning block is of a hollow structure; a second spring is arranged inside the positioning block, square grooves are formed in the upper end and the lower end of the positioning block, limiting blocks are fixed to the upper end and the lower end of the second spring, the lower end of the upper limiting block movably abuts against the upper surface of the positioning block on the side edge of the square groove, and the upper end of the lower limiting block movably abuts against the lower surface of the positioning block on the side edge of the square groove; an adjusting rod is fixed at the left end of the positioning block, and an inclined plane is arranged at the contact position of the positioning block and the adjusting rod; the adjusting rod is arranged in an L-shaped structure; the armrest body is internally provided with an adjusting mechanism, a patient can adjust the armrest according to the degree of the patient, and the armrest body is provided with a hand-holding mechanism, so that the patient with nervous emotion can grasp the handle to relieve the nervous emotion.

Description

Dental chair armrest
Technical Field
The utility model relates to the technical field of dental equipment, concretely relates to dental chair handrail.
Background
Common dental chair handrail is fixed, but also has the dental chair handrail of rotatable regulation, but this kind of dental chair handrail often needs medical personnel to adjust, and the patient is difficult to adjust by oneself, has produced a large amount of troubles, and the patient often has very big fear psychology when the dentistry is on a doctor, can subconsciously grasp the dental chair handrail and carry out the mood and alleviate, and current dental chair handrail is not fit for grasping tightly, very inconvenient patient, for this reason, a dental chair handrail is provided now.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dentistry chair handrail to prior art's defect and not enough, be equipped with adjustment mechanism in the handrail main part, patient can adjust the handrail according to the degree of oneself, is equipped with and holds the mechanism, and nervous patient of mood can grasp the handle, alleviates nervous mood.
In order to achieve the above object, the utility model adopts the following technical scheme: it comprises a handrail main body; the method is characterized in that: it also comprises a cavity, an adjusting mechanism and a hand-holding mechanism.
The armrest main body is arranged in an L-shaped structure; a cavity is arranged in the handrail main body and is of an L-shaped structure; an adjusting mechanism is arranged in the cavity; the adjusting mechanism comprises a first spring, an adjusting plate, a positioning block, an adjusting rod, a second spring, a limiting block, a first through hole and a second through hole; a first spring is fixed at the right end of the rear side in the cavity, and an adjusting plate is fixed at the left end of the first spring; a positioning block is fixed in the middle of the left side of the adjusting plate, and the interior of the positioning block is of a hollow structure; a second spring is arranged inside the positioning block, square grooves are formed in the upper end and the lower end of the positioning block, limiting blocks are fixed to the upper end and the lower end of the second spring, the lower end of the upper limiting block movably abuts against the upper surface of the positioning block on the side edge of the square groove, and the upper end of the lower limiting block movably abuts against the lower surface of the positioning block on the side edge of the square groove; an adjusting rod is fixed at the left end of the positioning block, and an inclined plane is arranged at the contact position of the positioning block and the adjusting rod; the adjusting rod is arranged in an L-shaped structure;
the upper end and the lower end of the cavity are both provided with a first through hole, and the limiting block penetrates through the second through hole and then extends to the outer side of the handrail main body; a second through hole is formed in the left side of the cavity, and the left end of the adjusting rod penetrates through the second through hole and then extends to the left side of the handrail main body; the left side and the right side of the dental chair back are both provided with a second sliding groove, and the right end of the handrail main body is arranged in the second sliding groove; the upper and lower two inner of No. two spouts all seted up the relative hole of several, the stopper passes and inserts after No. two through-holes and establish and fix in the hole that corresponds:
the hand-holding mechanism comprises a slide rail, a slide bar, a connecting bar, a third spring and a handle; sliding rails are fixed on the front side and the rear side of the left end of the handrail main body; a slide bar is arranged on the slide rail in a sliding manner, and connecting bars are fixed on the front side and the rear side of the left end of the slide bar; the opposite sides of the two connecting strips are both fixed with a third spring, and a handle is fixed between the third springs.
Furthermore, a Bluetooth sound box is fixed on the left side in the cavity, and a battery is arranged in the Bluetooth sound box.
Furthermore, a first sliding block is fixed at the upper end and the lower end of the adjusting plate; a spout has all been seted up to both ends about cavity rear side right-hand member, a slider slides and locates in the spout.
Furthermore, one end of the handrail main body is provided with a bandage, and the other end of the bandage is provided with a magic tape.
Furthermore, the utility model also comprises a warm-keeping mechanism; the heat-preservation mechanism comprises a sponge layer, a groove, a heating wire and a switch; a sponge layer is fixed on the handrail main body; the upper end of the sponge layer is provided with a groove; the bottom of the groove is provided with a heating wire, and the heating wire is connected with an external power supply; the handrail main part left end be equipped with the switch, the switch passes through the wire and is connected with the heater strip.
Furthermore, a rubber cushion layer is fixed on the handle.
After the structure is adopted, the utility model discloses beneficial effect does: a dentistry chair handrail, be equipped with adjustment mechanism in the handrail main part, patient can adjust the handrail according to the degree of oneself, is equipped with and holds the mechanism, nervous patient can grasp the handle, alleviates nervous mood.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a schematic view of the internal structure of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic structural view of the present invention when the adjusting lever is pushed;
FIG. 6 is a schematic view of the structure of the armrest body of the present invention when connected to the back of the dental chair;
FIG. 7 is a schematic view of the position structure of the positioning block and the limiting block of the present invention;
description of reference numerals:
the novel dental chair comprises a handrail main body 1, a cavity 2, a Bluetooth sound box 3, an adjusting mechanism 4, a first spring 4-1, an adjusting plate 4-2, a first sliding block 4-3, a first sliding groove 4-4, a positioning block 4-5, an adjusting rod 4-6, a second spring 4-7, a limiting block 4-8, a first through hole 4-9, a second through hole 4-10, a square groove 4-11, a dental chair back 5, a second sliding groove 6, a hole 7, a hand holding mechanism 8, a sliding rail 8-1, a sliding strip 8-2, a connecting strip 8-3, a third spring 8-4, a handle 8-5, a warm-keeping mechanism 9, a sponge layer 9-1, a groove 9-2, a heating wire 9-3, a switch 9-4, a rubber cushion layer 10, a bandage 11 and a magic tape 12.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 7, the present embodiment includes a handrail main body 1, a cavity 2, a bluetooth speaker 3, an adjusting mechanism 4, a hand-holding mechanism 8, a warming mechanism 9, a rubber cushion layer 10, a binding band 11, and a magic tape 12; the handrail main body 1 is arranged in an L-shaped structure; a cavity 2 is arranged in the handrail main body 1, and the cavity 2 is arranged in an L-shaped structure; the left side in cavity 2 pass through the bolt fastening and be equipped with bluetooth speaker 3, bluetooth speaker 3 embeds the battery, bluetooth speaker 3 can be connected with electronic equipment such as cell-phone, can play music and relax patient's nervous mood.
An adjusting mechanism 4 is arranged in the cavity 2; the adjusting mechanism 4 comprises a first spring 4-1, an adjusting plate 4-2, a first sliding block 4-3, a first sliding groove 4-4, a positioning block 4-5, an adjusting rod 4-6, a second spring 4-7, a limiting block 4-8, a first through hole 4-9, a second through hole 4-10 and a square groove 4-11.
A first spring 4-1 is fixedly welded at the right end of the rear side in the cavity 2, and an adjusting plate 4-2 is fixedly welded at the left end of the first spring 4-1; a first sliding block 4-3 is fixed at the upper end and the lower end of the adjusting plate 4-2 through bolts; the upper end and the lower end of the right end of the rear side of the cavity 2 are both provided with a first sliding groove 4-4, and a first sliding block 4-3 is slidably arranged in the first sliding groove 4-4; a positioning block 4-5 is fixed in the middle of the left side of the adjusting plate 4-2 through a bolt, and the inside of the positioning block 4-5 is arranged in a hollow structure; a second spring 4-7 is arranged inside the positioning block 4-5, square grooves 4-11 are formed in the upper end and the lower end of the positioning block 4-5, limiting blocks 4-8 are fixedly welded to the upper end and the lower end of the second spring 4-7, the lower end of the upper limiting block 4-8 movably abuts against the upper surface of the positioning block 4-5 on the side edge of the square groove 4-11, and the upper end of the lower limiting block 4-8 movably abuts against the lower surface of the positioning block 4-5 on the side edge of the square groove 4-11 (the second spring 4-7 is in a stretching stress state); an adjusting rod 4-6 is fixedly welded at the left end of the positioning block 4-5, and an inclined plane is arranged at the contact part of the positioning block 4-5 and the adjusting rod 4-6; the adjusting rods 4-6 are arranged in an L-shaped structure; the upper end and the lower end of the cavity 2 are both provided with a first through hole 4-9, and a limiting block 4-8 penetrates through the second through hole 4-10 and then extends to the outer side of the handrail main body 1; a second through hole 4-10 is formed in the left side of the cavity 2, and the left end of the adjusting rod 4-6 penetrates through the second through hole 4-10 and then extends to the left side of the handrail main body 1; the left side and the right side of the dental chair back 5 are both provided with a second sliding groove 6, and the right end of the handrail main body 1 is arranged in the second sliding groove 6; a plurality of opposite holes 7 are formed in the upper inner end and the lower inner end of the second sliding groove 6, and the limiting blocks 4-8 penetrate through the second through holes 4-10 and are inserted and fixed in the corresponding holes 7; when a patient needs to adjust the position of the handrail after lying down, the part of the adjusting rod 4-6 exposed outside is pushed to the right, the first spring 4-1 is compressed, the adjusting plate 4-2 moves to the right to drive the positioning block 4-5 to move to the right, the resilience force of the second spring 4-7 pulls the upper and lower limiting blocks 4-8 inwards, after the inner end surface of the limiting block 4-8 contacts the inclined surface on the positioning block 4-5, the second spring 4-7 continues to retract, the limiting block 4-8 is further driven to move on the square groove 4-11 on the positioning block 4-5 until the inner end surface of the limiting block 4-8 abuts against the inclined surface close to the adjusting rod 4-6, the outer end of the limiting block 4-8 is separated from the hole 7 but still clamped in the first through hole 4-9, and the handrail main body 1 can move, after the handrail main body 1 is moved to a proper position, the part of the adjusting rod 4-6 exposed outside is released, the first spring 4-1 rebounds to push the adjusting plate 4-2 to the left, the inner end surfaces of the limiting blocks 4-8 contact the inclined plane on the positioning block 4-5 and then start to move outwards until the inner end surfaces of the upper limiting block 4-8 and the lower limiting block 4-8 respectively abut against the upper side surface and the lower side surface of the positioning block 4-5, and the outer ends of the limiting blocks 4-8 are clamped into the corresponding holes 7 to position the handrail main body 1.
The hand-held mechanism 8 comprises a slide rail 8-1, a slide bar 8-2, a connecting bar 8-3, a third spring 8-4 and a handle 8-5; the front side and the rear side of the left end of the handrail main body 1 are both fixed with sliding rails 8-1 through bolts; a sliding strip 8-2 is arranged on the sliding rail 8-1 in a sliding manner, and connecting strips 8-3 are welded and fixed on the front side and the rear side of the left end of the sliding strip 8-2; the opposite sides of the two connecting strips 8-3 are fixedly welded with third springs 8-4, and handles 8-5 are fixedly welded between the third springs 8-4; after the patient lies down and adjusts the position of the armrest main body 1, the patient holds the handle 8-5 and adjusts the position of the handle 8-5 under the action of the slide bar 8-2.
The warm-keeping mechanism 9 comprises a sponge layer 9-1, a groove 9-2, a heating wire 9-3 and a switch 9-4; a sponge layer 9-1 is fixedly adhered on the handrail main body 1; the upper end of the sponge layer 9-1 is provided with a groove 9-2, which is convenient for a patient to place arms; the bottom of the groove 9-2 is provided with a heating wire 9-3, and the heating wire 9-3 is connected with an external power supply; the left end of the handrail main body 1 is provided with a switch 9-4, and the switch 9-4 is connected with the heating wire 9-3 through a lead; when the weather is cold, a heating device is started in a hospital, but the actual heating effect is poor due to the large area of the hospital, the switch 9-4 is pressed down, and the heating wire 9-3 is started, so that the arms of a patient are kept warm; a rubber cushion layer 10 is fixedly adhered to the handle 8-5, so that a nervous patient can conveniently grasp the rubber cushion layer to relieve the emotion; handrail main part 1's one end be equipped with bandage 11, bandage 11's the other end is equipped with magic subsides 12, with bandage 11 after bypassing the arm, paste magic subsides 12 and take 11 on, the fixed arm of being convenient for avoids patient's nervous excitement arm can wave.
The working principle of the specific embodiment is as follows: when a patient needs to adjust the position of the armrest after lying down, the part of the adjusting rod 4-6 exposed outside is pushed to the right, the first spring 4-1 is compressed, the adjusting plate 4-2 moves to the right to drive the positioning block 4-5 to move to the right, the resilience force of the second spring 4-7 pulls the upper and lower limiting blocks 4-8 inwards, when the inner end surface of the limiting block 4-8 contacts the inclined surface on the positioning block 4-5, the second spring 4-7 continues to retract, the limiting block 4-8 is further driven to move on the square groove 4-11 on the positioning block 4-5 until the inner end surface of the limiting block 4-8 abuts against the inclined surface close to the adjusting rod 4-6, the outer end of the limiting block 4-8 is separated from the hole 7 but still clamped in the first through hole 4-9, the armrest main body 1 is moved, and the armrest main body 1 is moved to a proper position, the part of the adjusting rod 4-6 exposed outside is loosened, the first spring 4-1 rebounds to push the adjusting plate 4-2 to the left, the inner end surfaces of the limiting blocks 4-8 contact the inclined plane on the positioning block 4-5 and then start to move outwards until the inner end surfaces of the upper limiting block 4-8 and the lower limiting block 4-8 abut against the upper side surface and the lower side surface of the positioning block 4-5 respectively, and the outer ends of the limiting blocks 4-8 are clamped into the corresponding holes 7 to position the handrail main body 1; after the patient lies down and adjusts the position of the armrest main body 1, the patient holds the handle 8-5, the sliding strip 8-2 moves in the sliding rail 8-1 to drive the connecting strip 8-3 to move, so that the handle 8-5 is driven to move, and the position of the handle 8-5 is adjusted; when the weather is cold, a heating device can be started in a hospital, but the actual heating effect is not good due to the large area of the hospital, and a patient is often in an extremely tense state when looking at the dental department, so that the stiff arms and the blood do not circulate, the switch 9-4 is pressed, the heating wire 9-3 is started, the arms of the patient are kept warm, and the blood circulation is accelerated.
After adopting above-mentioned structure, this embodiment's beneficial effect does:
1. the armrest main body 1 is internally provided with an adjusting mechanism 4, and a patient can adjust the armrest according to the degree of the patient;
2. the left end of the handrail main body 1 is provided with a hand-holding mechanism 8, and a patient with tension can hold the handle 8-5 to relieve tension;
3. the warming mechanism 9 is arranged, so that the stiff arms and blood of the patient can not circulate when the patient is in an extremely tense state, and the warming mechanism 9 can warm the arms of the patient and accelerate the blood circulation.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. A dental chair armrest comprising an armrest body (1); the method is characterized in that: it also comprises a cavity (2), an adjusting mechanism (4) and a hand-holding mechanism (8);
the handrail main body (1) is arranged in an L-shaped structure; a cavity (2) is arranged in the handrail main body (1), and the cavity (2) is arranged in an L-shaped structure; an adjusting mechanism (4) is arranged in the cavity (2); the adjusting mechanism (4) comprises a first spring (4-1), an adjusting plate (4-2), a positioning block (4-5), an adjusting rod (4-6), a second spring (4-7), a limiting block (4-8), a first through hole (4-9) and a second through hole (4-10); a first spring (4-1) is fixed at the right end of the rear side in the cavity (2), and an adjusting plate (4-2) is fixed at the left end of the first spring (4-1); a positioning block (4-5) is fixed in the middle of the left side of the adjusting plate (4-2), and the inside of the positioning block (4-5) is arranged in a hollow structure; a second spring (4-7) is arranged inside the positioning block (4-5), square grooves (4-11) are formed in the upper end and the lower end of the positioning block (4-5), limiting blocks (4-8) are fixed to the upper end and the lower end of the second spring (4-7), the lower end of the upper limiting block (4-8) movably abuts against the upper surface of the positioning block (4-5) on the side edge of the square groove (4-11), and the upper end of the lower limiting block (4-8) movably abuts against the lower surface of the positioning block (4-5) on the side edge of the square groove (4-11); an adjusting rod (4-6) is fixed at the left end of the positioning block (4-5), and an inclined plane is arranged at the contact position of the positioning block (4-5) and the adjusting rod (4-6); the adjusting rods (4-6) are arranged in an L-shaped structure;
the upper end and the lower end of the cavity (2) are respectively provided with a first through hole (4-9), and the limiting block (4-8) penetrates through the second through hole (4-10) and then extends to the outer side of the handrail main body (1); a second through hole (4-10) is formed in the left side of the cavity (2), and the left end of the adjusting rod (4-6) penetrates through the second through hole (4-10) and then extends to the left side of the handrail main body (1); the left side and the right side of the dental chair back (5) are both provided with a second sliding groove (6), and the right end of the handrail main body (1) is arranged in the second sliding groove (6); a plurality of opposite holes (7) are formed in the upper inner end and the lower inner end of the second sliding groove (6), and the limiting blocks (4-8) penetrate through the second through holes (4-10) and are inserted and fixed in the corresponding holes (7);
the hand-held mechanism (8) comprises a slide rail (8-1), a slide bar (8-2), a connecting bar (8-3), a third spring (8-4) and a handle (8-5); sliding rails (8-1) are fixed on the front side and the rear side of the left end of the handrail main body (1); a sliding strip (8-2) is arranged on the sliding rail (8-1) in a sliding manner, and connecting strips (8-3) are fixed on the front side and the rear side of the left end of the sliding strip (8-2); three springs (8-4) are fixed on the opposite sides of the two connecting strips (8-3), and a handle (8-5) is fixed between the three springs (8-4).
2. The dental chair armrest of claim 1, wherein: the left side in cavity (2) be fixed with bluetooth speaker (3), bluetooth speaker (3) built-in battery.
3. The dental chair armrest of claim 1, wherein: a first sliding block (4-3) is fixed at the upper end and the lower end of the adjusting plate (4-2); a first sliding groove (4-4) is formed in the upper end and the lower end of the right end of the rear side of the cavity (2), and a first sliding block (4-3) is slidably arranged in the first sliding groove (4-4).
4. The dental chair armrest of claim 1, wherein: one end of the handrail main body (1) is provided with a bandage (11), and the other end of the bandage (11) is provided with a magic tape (12).
5. The dental chair armrest of claim 1, wherein: it also comprises a warm-keeping mechanism (9); the warm-keeping mechanism (9) comprises a sponge layer (9-1), a groove (9-2), a heating wire (9-3) and a switch (9-4); a sponge layer (9-1) is fixed on the handrail main body (1); the upper end of the sponge layer (9-1) is provided with a groove (9-2); the bottom of the groove (9-2) is provided with a heating wire (9-3), and the heating wire (9-3) is connected with an external power supply; the left end of the handrail main body (1) is provided with a switch (9-4), and the switch (9-4) is connected with the heating wire (9-3) through a lead.
6. The dental chair armrest of claim 5, wherein: a rubber cushion layer (10) is fixed on the handle (8-5).
CN201922346580.0U 2019-12-24 2019-12-24 Dental chair armrest Expired - Fee Related CN211750822U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922346580.0U CN211750822U (en) 2019-12-24 2019-12-24 Dental chair armrest

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922346580.0U CN211750822U (en) 2019-12-24 2019-12-24 Dental chair armrest

Publications (1)

Publication Number Publication Date
CN211750822U true CN211750822U (en) 2020-10-27

Family

ID=72976293

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922346580.0U Expired - Fee Related CN211750822U (en) 2019-12-24 2019-12-24 Dental chair armrest

Country Status (1)

Country Link
CN (1) CN211750822U (en)

Similar Documents

Publication Publication Date Title
CN211750822U (en) Dental chair armrest
CN206950257U (en) A kind of reduction of the fracture lock
CN204562493U (en) Cervical vertebra head traction device
CN213758884U (en) Portable medical cold compress subsides convenient to it is fixed
CN216148470U (en) Clinical practise midwifery device of obstetrical department
CN202179666U (en) Head support for neurosurgical operation
CN213588266U (en) Head fixing device for magnetic resonance examination convenient to adjust
CN214104736U (en) Head positioning device for stomatological treatment
CN214157321U (en) Arm support for blood sampling of physical examination center
CN212730315U (en) Be used for emergency internal medicine critical patient to salvage device
CN210749543U (en) Operation body position fixer for pediatric surgery
CN211381840U (en) Fixing device for pediatric orthopedics
CN210990633U (en) Knee joint puncture depth positioning device
CN211584064U (en) Strutting arrangement for shank operation of being convenient for
CN201602918U (en) Medical temporomandibular joint positor for stomatological department
CN210784729U (en) Head fixing device for plastic surgery
CN220141723U (en) Auxiliary fixer for eye local operation
CN213431367U (en) Auxiliary positioning device for pediatric anesthesia
CN216877012U (en) Clinical supplementary device of practising midwifery of obstetrical department
CN215425770U (en) PRP knee treatment mount
CN214318157U (en) Ophthalmic surgery fixing device
CN214761285U (en) Novel hemostatic forceps for emergency nursing
CN218420334U (en) Obstetrician is with practise midwifery device
CN212816572U (en) Auxiliary treatment device for hand and foot microsurgery
CN213098403U (en) Side-lying operation fixing device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201027

Termination date: 20211224