CN113777904A - Hand-held music metronome - Google Patents
Hand-held music metronome Download PDFInfo
- Publication number
- CN113777904A CN113777904A CN202111074988.2A CN202111074988A CN113777904A CN 113777904 A CN113777904 A CN 113777904A CN 202111074988 A CN202111074988 A CN 202111074988A CN 113777904 A CN113777904 A CN 113777904A
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- CN
- China
- Prior art keywords
- metronome
- device body
- hand
- limiting plate
- pressure sealing
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/02—Metronomes
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
- G04B37/14—Suspending devices, supports or stands for time-pieces insofar as they form part of the case
- G04B37/1473—Supports and feet for supporting the clockwork
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
- G04B43/002—Component shock protection arrangements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
Abstract
The invention discloses a hand-held music metronome, which relates to the technical field of teaching auxiliary tools and comprises a metronome structure and a dustproof cover structure arranged at the upper end of the metronome structure, wherein the dustproof cover structure is hinged at the edge of the outer wall at one side of the metronome structure, the metronome structure comprises a device body, a positioning fixing piece arranged at one end of the device body and a compression air bag body arranged at the bottom of the device body, a pendulum display screen and a ringer are respectively arranged on the surface of the device body, two groups of slots are symmetrically arranged at two sides of the outer wall at the bottom side of the device body, a pressure sealing cavity is arranged in the inner cavity of the device body, and the inner side of the compression air bag body is communicated with the inner cavity of the pressure sealing cavity through a gas pipe. After the external impact force of the metronome after falling disappears gradually, the air in the pressure sealing cavity is compressed back into the compression air bag body again, so that the metronome is restored to the initial state, the damage of the instrument caused by the accidental falling is avoided, and the maintenance cost is also reduced.
Description
Technical Field
The invention relates to the technical field of teaching auxiliary tools, in particular to a handheld music metronome.
Background
In the course of classroom teaching, the metronome is one of the devices that guide the student to practice voice effectively, and the metronome can not only effectively control rhythm, but also needs to guide the student to pay attention to the focus in classroom. The metronome stably sends out the music rhythm in different music rhythms, so that the teaching process is carried out efficiently, and the teaching efficiency is improved; the sound of the metronome can be observed and heard by each student, which directly influences the teaching efficiency.
The general metronome is always held in the hands of teachers, a large amount of physical strength needs to be consumed in the teaching process, particularly in summer, the hands of teachers generate sweat and oily secretion, the metronome is easy to slide off, the surface of the metronome is easy to be stained with dust when the metronome is not used, the shell of the metronome cannot be protected properly, instruments are easy to damage when the metronome is inadvertently dropped, and the maintenance cost is high.
Addressing these facing problems and challenges. Therefore, the invention provides a handheld music metronome.
Disclosure of Invention
The invention aims to provide a handheld music metronome, so that the problems that the traditional metronome is easy to slip off when being held by hands and is easy to damage after falling are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a hand-held music metronome comprises a metronome structure and a dustproof cover structure arranged at the upper end of the metronome structure, wherein the dustproof cover structure is hinged at the edge of the outer wall at one side of the metronome structure, the metronome structure comprises a device body, a positioning fixing piece arranged at one end of the device body and a compressed air bag body arranged at the bottom of the device body, a pendulum display screen and a ringer are respectively arranged on the surface of the device body, two groups of slots are symmetrically arranged at the two sides of the outer wall at the bottom side of the device body, a pressure sealing cavity is arranged in the inner cavity of the device body, the inner side of the compressed air bag body is communicated with the inner cavity of the pressure sealing cavity through a gas pipe, and the dustproof cover structure is hinged at the edge of the outer wall at one side of the device body, which is far away from the slots;
the dustproof cover structure comprises a cover body movably connected with the device body, a containing groove formed in the surface of the cover body and a supporting frame movably installed in the containing groove, an inserting block corresponding to the slot is fixedly arranged at the upper end of the outer side edge of the cover body, and the inserting block is matched with the slot.
Furthermore, the inner wall of the positioning and fixing part and one side far away from the device body are welded with a positioning plate, the bottom end of the positioning plate is provided with an elastic part, a pressure rod extends into the inner cavity of the positioning and fixing part, and one end of the pressure rod is connected with the elastic part.
Furthermore, the outer side of the pressure rod is movably connected with the pressure sealing chamber, the joint of the pressure rod and the pressure sealing chamber is subjected to sealing and reinforcing treatment, one end of the pressure rod, which is far away from the elastic piece, extends into the pressure sealing chamber, the bottom end of the pressure rod is provided with a piston piece, and the piston piece is positioned in the pressure sealing chamber.
Further, the inside surface mounting of lid has the buffering glue film, and one side of braced frame runs through there is long pivot, and the middle part of long pivot is located the holding tank, the both ends of long pivot all pass the lid and extend to the outside of lid.
Furthermore, a handheld assembly is movably mounted in the inner cavity of the device body, the handheld assembly comprises a drawing limiting plate movably connected with the device body, a buffering bag body mounted on the surface of the drawing limiting plate, a limiting plate fixedly arranged on the surface of the buffering bag body and a movable sliding plate movably arranged on the surface of the limiting plate, blocking parts are arranged at two ends of the inner side of the drawing limiting plate, and a sliding channel is further processed in the middle of the surface of the limiting plate.
Furthermore, the bottom end of the movable sliding plate is provided with a sliding block corresponding to the sliding groove channel, the movable sliding plate is movably connected with the sliding groove channel through the sliding block, the sliding groove channel is matched with the sliding block, clamping groove strips are symmetrically arranged on two sides of the surface of the movable sliding plate, a holding handle is movably arranged on the outer side of the movable sliding plate, and the inner side of the holding handle is clamped in an inner cavity of the clamping groove strips.
Further, the surface of the pull limiting plate is provided with a first square fixed cylinder and a second square fixed cylinder respectively, the first square fixed cylinder and the second square fixed cylinder are located on two sides of the limiting plate respectively, and arc-shaped magnetic grooves are formed in an inner cavity of the first square fixed cylinder.
Furthermore, install the elasticity stretching strap in the inner chamber of the square fixed section of thick bamboo of second, the surface of elasticity stretching strap is provided with ventilative layer and its top sets firmly the locking bar magnet that matches each other with the arc magnetic channel, and magnetism is connected between locking bar magnet and the arc magnetic channel.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a hand-held music metronome, wherein a pressure sealing chamber is arranged in an inner cavity of a device body, the inner side of a compression air bag body is communicated with the inner cavity of the pressure sealing chamber through an air pipe, so that after the metronome is used and accidentally falls off vertically, the ground can directly impact on the compression air bag body and extrude the air in the compression air bag body, at the moment, the air in the compression air bag body is quickly discharged into the pressure sealing chamber through the air pipe due to the impact of external force, simultaneously, the internal pressure of the pressure sealing chamber is increased and quickly generates thrust to push a piston member outwards, a pressure rod connected with one end of the piston member can synchronously extrude the elastic member, after the external force disappears gradually, the reaction force generated after the elastic member is compressed can push the pressure rod and the piston member inwards, and the air in the pressure sealing chamber is pressed back into the compression air bag body again to restore the initial state, and the bottom of the metronome can be protected in due time, so that the damage of the instrument caused by the inadvertent falling is avoided, and the maintenance cost is also reduced.
2. The invention provides a hand-held music metronome, wherein a hand-held component is movably arranged in an inner cavity of a device body, and a long rotating shaft penetrates through one side of a supporting frame, so that when the metronome is used, a drawing limiting plate can slide out from the device body for a certain distance and is limited by a baffle piece, then the position of a holding handle is adjusted by a slide block in due time according to the arm length of a user, the metronome is more comfortable to use and is convenient and quick to disassemble, after the holding handle is held tightly, an elastic pull belt of a second square fixing cylinder can stretch across the arm and clamp a locking magnetic rod into an arc magnetic groove of a first square fixing cylinder and carry out magnetic attraction and fixation, the dropping during the use is avoided, the hand-held stability is relatively improved, the use is more convenient, and the supporting frame can be rotated out from the accommodating groove by the long rotating shaft in a non-hand state, the metronome is convenient to support for use.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the present invention with the cover opened;
FIG. 3 is a schematic diagram of the internal planar structure of the side view device body of the present invention;
FIG. 4 is a schematic view of a hand held assembly according to the present invention;
FIG. 5 is an enlarged view of the structure at A in FIG. 4 according to the present invention;
FIG. 6 is a schematic diagram of a limiting plate structure according to the present invention.
In the figure: 1. a metronome structure; 11. a device body; 111. a pendulum display screen; 112. a ringer; 113. A slot; 114. a pressure sealed chamber; 12. positioning the firmware; 121. positioning a plate; 1211. an elastic member; 122. a pressure lever; 1221. a piston member; 13. compressing the balloon body; 131. a gas delivery pipe; 2. a dust cover structure; 21. a cover body; 211. inserting a block; 212. a buffer glue layer; 22. accommodating grooves; 23. a support frame; 231. A long rotating shaft; 3. a handheld assembly; 31. drawing a limiting plate; 311. a gear member; 32. a buffer bladder; 33. A limiting plate; 331. a chute channel; 34. a movable skateboard; 341. a slider; 342. a slot clamping strip; 343. a handle is held; 4. a first square fixed cylinder; 41. an arc-shaped magnetic slot; 5. a second square stationary cylinder; 51. an elastic drawstring; 511. a breathable layer; 512. and locking the magnetic rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a hand-held music metronome comprises a metronome structure 1 and a dust cover structure 2 installed on the upper end of the metronome structure 1, the dust cover structure 2 is hinged on the edge of the outer wall of one side of the metronome structure 1, the metronome structure 1 comprises a device body 11, a positioning fixing member 12 installed at one end of the device body 11 and a compression air bag body 13 arranged at the bottom of the device body 11, a pendulum display screen 111 and a ringer 112 are respectively arranged on the surface of the device body 11, two groups of slots 113 are symmetrically arranged on the two sides of the outer wall of the bottom side of the device body, a pressure sealing chamber 114 is arranged in the inner cavity of the device body 11, the inner side of the compression air bag body 13 is communicated with the inner cavity of the pressure sealing chamber 114 through an air pipe 131, the air inside of the compression air bag body 13 can be rapidly discharged into the pressure sealing chamber 114 through the air pipe 131 due to external force, meanwhile, the internal pressure of the pressure sealing chamber 114 rises and rapidly generates thrust to push the piston piece 1221 outwards, and the edge of the outer wall of one side of the device body 11, which is far away from the slot 113, is hinged with a dustproof cover structure 2;
the dustproof cover structure 2 comprises a cover body 21 movably connected with the device body 11, an accommodating groove 22 formed in the surface of the cover body 21 and a supporting frame 23 movably installed in the accommodating groove 22, wherein an inserting block 211 corresponding to the slot 113 is fixedly arranged at the upper end of the outer side edge of the cover body 21, the inserting block 211 and the slot 113 are matched with each other, and the inserting block 211 can be inserted into the slot 113 so as to prevent dust from falling when the metronome is not used;
a positioning plate 121 is welded on the inner wall of the positioning fastener 12 and on one side away from the device body 11, an elastic member 1211 is arranged at the bottom end of the positioning plate 121, a pressing rod 122 also extends into the inner cavity of the positioning fastener 12, one end of the pressing rod 122 is connected with the elastic member 1211, after the external force disappears gradually, the reaction force generated by the compression of the elastic member 1211 pushes the pressing rod 122 and the piston member 1221 inwards, and the pressing rod 122 connected with one end of the piston member 1221 can also extrude the elastic member 1211 synchronously;
the outer side of the pressure rod 122 is movably connected with the pressure sealing chamber 114 and the joint of the pressure rod 122 and the pressure sealing chamber 114 is subjected to sealing reinforcement treatment, one end of the pressure rod 122, which is far away from the elastic member 1211, extends into the pressure sealing chamber 114 and the bottom end of the pressure rod is provided with a piston member 1221, and the piston member 1221 is positioned in the pressure sealing chamber 114;
the inside surface mounting of lid 21 has buffer glue layer 212, and one side of braced frame 23 runs through long pivot 231, and the middle part of long pivot 231 is arranged in holding tank 22, and the both ends of long pivot 231 all pass lid 21 and extend to the outside of lid 21, and the metronome also can utilize long pivot 231 to roll out from holding tank 22 with braced frame 23 under the non-handheld state, is convenient for support the metronome and uses.
Referring to fig. 4-6, a hand-held music metronome, wherein a hand-held component 3 is movably mounted in an inner cavity of a device body 11, the hand-held component 3 includes a drawing limiting plate 31 movably connected with the device body 11, a buffering bag body 32 mounted on a surface of the drawing limiting plate 31, a limiting plate 33 fixedly mounted on a surface of the buffering bag body 32, and a movable sliding plate 34 movably mounted on a surface of the limiting plate 33, two ends of an inner side of the drawing limiting plate 31 are respectively provided with a stopper 311, when in use, the drawing limiting plate 31 can slide out a distance from the device body 11 and is limited by the stopper 311, a sliding chute 331 is further processed in a middle portion of the surface of the limiting plate 33, a sliding block 341 corresponding to the sliding chute 331 is disposed at a bottom end of the movable sliding plate 34, the movable sliding plate 34 is movably connected with the sliding chute 331 through the sliding block 341, and the sliding chute 331 is matched with the sliding block 341, the two sides of the surface of the movable sliding plate 34 are symmetrically provided with clamping groove strips 342, the outer sides of the clamping groove strips are movably provided with holding handles 343, the inner sides of the holding handles 343 are clamped in the inner cavities of the clamping groove strips 342, and the positions of the holding handles 343 are adjusted by utilizing the sliding blocks 341 at proper time according to the lengths of the arms of the user;
the surface of the drawing limiting plate 31 is also provided with a first square fixed cylinder 4 and a second square fixed cylinder 5 respectively, the first square fixed cylinder 4 and the second square fixed cylinder 5 are respectively positioned at two sides of the limiting plate 33, and an arc-shaped magnetic groove 41 is arranged in the inner cavity of the first square fixed cylinder 4;
install elastic pull belt 51 in the inner chamber of the square fixed cylinder 5 of second, elastic pull belt 51's surface is provided with ventilative layer 511 and its top sets firmly locking bar magnet 512 with arc magnetic tank 41 mutual matching, and magnetism is connected between locking bar magnet 512 and the arc magnetic tank 41, after holding and holding handle 343, can stride across the arm with elastic pull belt 51 of the square fixed cylinder 5 of second and stretch and go into locking bar magnet 512 card and carry out the magnetism and inhale fixedly in the arc magnetic tank 41 of the fixed cylinder 4 of first square.
The working principle is as follows: when the metronome is used and accidentally falls off vertically, the ground directly impacts the compressed air bag body 13 and presses air in the compressed air bag body 13, at the moment, the air in the compressed air bag body 13 is quickly discharged into the pressure sealing chamber 114 through the air pipe 131 due to external force impact, meanwhile, the internal pressure of the pressure sealing chamber 114 rises and quickly generates thrust to push the piston member 1221 outwards, the pressure rod 122 connected to one end of the piston member 1221 can synchronously press the elastic member 1211, after the external force disappears gradually, the reaction force generated after the elastic member 1211 compresses can inwards push the pressure rod 122 and the piston member 1221, and the air in the pressure sealing chamber 114 is pressed back into the compressed air bag body 13 again to restore the original state, and the bottom of the metronome can be protected timely.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a hand-held type music metronome, includes metronome structure (1) and installs dust cover structure (2) in metronome structure (1) upper end, and one side outer wall border department of metronome structure (1) articulates there is dust cover structure (2), its characterized in that: the metronome structure (1) comprises a device body (11), a positioning fixing piece (12) arranged at one end of the device body (11) and a compression air bag body (13) arranged at the bottom of the device body (11), wherein a pendulum display screen (111) and a ringer (112) are respectively arranged on the surface of the device body (11), two groups of slots (113) are symmetrically arranged on two sides of the outer wall of the bottom side of the device body, a pressure sealing chamber (114) is arranged in the inner cavity of the device body (11), the inner side of the compression air bag body (13) is communicated with the inner cavity of the pressure sealing chamber (114) through an air conveying pipe (131), and a dustproof cover structure (2) is hinged to the edge of the outer wall of one side of the device body (11) far away from the slots (113);
the dustproof cover structure (2) comprises a cover body (21) movably connected with the device body (11), an accommodating groove (22) formed in the surface of the cover body (21) and a supporting frame (23) movably mounted in the accommodating groove (22), an inserting block (211) corresponding to the slot (113) is fixedly arranged at the upper end of the outer side edge of the cover body (21), and the inserting block (211) is matched with the slot (113) mutually.
2. A hand-held music metronome according to claim 1, characterized in that: a positioning plate (121) is welded on one side, away from the device body (11), of the inner wall of the positioning fixing piece (12), an elastic piece (1211) is arranged at the bottom end of the positioning plate (121), a pressing rod (122) extends into an inner cavity of the positioning fixing piece (12), and one end of the pressing rod (122) is connected with the elastic piece (1211).
3. A hand-held music metronome according to claim 2, wherein: the outer side of the pressure lever (122) is movably connected with the pressure sealing chamber (114) and the joint of the pressure lever and the pressure sealing chamber (114) is subjected to sealing reinforcement treatment, one end, far away from the elastic piece (1211), of the pressure lever (122) extends into the pressure sealing chamber (114), the bottom end of the pressure lever is provided with a piston piece (1221), and the piston piece (1221) is located in the pressure sealing chamber (114).
4. A hand-held music metronome according to claim 1, characterized in that: the utility model discloses a lid, including lid (21), lid (21) inside surface mounting has buffer glue layer (212), and one side of braced frame (23) runs through long pivot (231), and the middle part of long pivot (231) is arranged in holding tank (22), the both ends of long pivot (231) all pass lid (21) and extend to the outside of lid (21).
5. A hand-held music metronome according to claim 1, characterized in that: movably mounted has handheld subassembly (3) in the inner chamber of device body (11), handheld subassembly (3) include with device body (11) between for swing joint's pull limiting plate (31), install buffering utricule (32) on pull limiting plate (31) surface, set firmly limiting plate (33) on buffering utricule (32) surface and activity setting in the activity slide (34) on limiting plate (33) surface, the inboard both ends of pull limiting plate (31) all are provided with fender position spare (311), and the surperficial middle part of limiting plate (33) has still processed chute way (331).
6. A hand-held music metronome according to claim 5, wherein: the bottom end of the movable sliding plate (34) is provided with a sliding block (341) corresponding to the sliding groove channel (331), the movable sliding plate (34) is movably connected with the sliding groove channel (331) through the sliding block (341) and the sliding groove channel (331) is matched with the sliding block (341), the two sides of the surface of the movable sliding plate (34) are symmetrically provided with clamping groove strips (342), the outer sides of the clamping groove strips are movably provided with holding handles (343), and the inner sides of the holding handles (343) are clamped in the inner cavities of the clamping groove strips (342).
7. A hand-held music metronome according to claim 5, wherein: the surface of the drawing limiting plate (31) is further provided with a first square fixing cylinder (4) and a second square fixing cylinder (5) respectively, the first square fixing cylinder (4) and the second square fixing cylinder (5) are located on two sides of the limiting plate (33) respectively, and arc-shaped magnetic grooves (41) are formed in an inner cavity of the first square fixing cylinder (4).
8. A hand-held music metronome according to claim 7, wherein: an elastic drawstring (51) is installed in the inner cavity of the second square fixing cylinder (5), a breathable layer (511) is arranged on the surface of the elastic drawstring (51), a locking magnetic bar (512) matched with the arc-shaped magnetic groove (41) is fixedly arranged at the top end of the elastic drawstring (51), and the locking magnetic bar (512) is magnetically connected with the arc-shaped magnetic groove (41).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202111074988.2A CN113777904A (en) | 2021-09-14 | 2021-09-14 | Hand-held music metronome |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202111074988.2A CN113777904A (en) | 2021-09-14 | 2021-09-14 | Hand-held music metronome |
Publications (1)
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CN113777904A true CN113777904A (en) | 2021-12-10 |
Family
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Family Applications (1)
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CN202111074988.2A Withdrawn CN113777904A (en) | 2021-09-14 | 2021-09-14 | Hand-held music metronome |
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CN (1) | CN113777904A (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004021092A1 (en) * | 2002-08-30 | 2004-03-11 | Taesung Ins Co., Ltd. | Digital metronome having fixing structure thereof |
CN109502450A (en) * | 2018-12-27 | 2019-03-22 | 西威电梯江苏有限公司 | It is a kind of with a group buffer of elevator for frame structure |
CN208721995U (en) * | 2018-08-09 | 2019-04-09 | 河南有个圈网络科技有限公司 | A kind of smart electronics clock and watch |
CN211041952U (en) * | 2019-11-13 | 2020-07-17 | 山西警察学院 | Police is with holding positioner of protection shield |
CN211857203U (en) * | 2020-05-20 | 2020-11-03 | 深圳市纳晶云科技有限公司 | Breakage-proof screen intelligent watch |
CN211884195U (en) * | 2019-12-04 | 2020-11-10 | 李芳芳 | Restraint strap for surgical nursing |
CN113311691A (en) * | 2021-06-10 | 2021-08-27 | 深圳市纳晶云科技有限公司 | Intelligent watch with strong collision protection function |
CN215177280U (en) * | 2021-06-12 | 2021-12-14 | 广东粤盾警用装备有限公司 | Multifunctional tactical arm shield |
-
2021
- 2021-09-14 CN CN202111074988.2A patent/CN113777904A/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004021092A1 (en) * | 2002-08-30 | 2004-03-11 | Taesung Ins Co., Ltd. | Digital metronome having fixing structure thereof |
CN208721995U (en) * | 2018-08-09 | 2019-04-09 | 河南有个圈网络科技有限公司 | A kind of smart electronics clock and watch |
CN109502450A (en) * | 2018-12-27 | 2019-03-22 | 西威电梯江苏有限公司 | It is a kind of with a group buffer of elevator for frame structure |
CN211041952U (en) * | 2019-11-13 | 2020-07-17 | 山西警察学院 | Police is with holding positioner of protection shield |
CN211884195U (en) * | 2019-12-04 | 2020-11-10 | 李芳芳 | Restraint strap for surgical nursing |
CN211857203U (en) * | 2020-05-20 | 2020-11-03 | 深圳市纳晶云科技有限公司 | Breakage-proof screen intelligent watch |
CN113311691A (en) * | 2021-06-10 | 2021-08-27 | 深圳市纳晶云科技有限公司 | Intelligent watch with strong collision protection function |
CN215177280U (en) * | 2021-06-12 | 2021-12-14 | 广东粤盾警用装备有限公司 | Multifunctional tactical arm shield |
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Application publication date: 20211210 |