CN111986527A - Early education machine of card for infant - Google Patents
Early education machine of card for infant Download PDFInfo
- Publication number
- CN111986527A CN111986527A CN202010923776.6A CN202010923776A CN111986527A CN 111986527 A CN111986527 A CN 111986527A CN 202010923776 A CN202010923776 A CN 202010923776A CN 111986527 A CN111986527 A CN 111986527A
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- China
- Prior art keywords
- card
- infant
- guide groove
- machine body
- early education
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
- G09B5/062—Combinations of audio and printed presentations, e.g. magnetically striped cards, talking books, magnetic tapes with printed texts thereon
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
Abstract
The invention discloses an infant card early education machine which comprises a bracket, wherein a machine body with a card stacking containing cavity and a card display area is arranged on the bracket, a card outlet is arranged on one side of the card stacking containing cavity, a plurality of cards are arranged in the card stacking containing cavity, an elastic supporting mechanism is arranged in the card stacking containing cavity, first guide grooves aligned with the card outlet are arranged on two sides of the card display area, a second guide groove connected with the first guide groove is further arranged in the machine body, an elastic switching mechanism is arranged at the joint of the second guide groove and the first guide groove, a slide rail is arranged in the machine body, a slide block is arranged on the slide rail in a sliding manner, a driving mechanism for driving the slide block to move back and forth along the slide rail is further arranged in the machine body, a first magnet is arranged on the slide block. This kind of card early education machine for infant can replace the handheld card of people to can the automatic switch-over card, alleviate the head of a family's burden, alleviate family's long child's fatigue.
Description
Technical Field
The invention belongs to the technical field of infant articles, and particularly relates to an infant card early education machine which is used for automatically switching black and white cards or color cards for infant early education.
Background
With the gradual improvement of living standard and the increasing social competitive pressure, in order to prevent the children from being lost on the starting line, people pay more and more attention to the early education of the infants, the brain of the newborn is like a piece of white paper, enough sensory stimulation needs to be externally connected, various functions are gradually developed, and the more stimulation is, the faster the development is. However, this rapid development occurs only in a few years shortly after birth, again in the golden phase of 0-3 years. Most of the external information ingested by the brain of the newborn comes from the eyes, and the more visual stimulation the baby receives, the better the development of the visual nerve and the brain of the baby can be promoted.
Because the screen has excessive stimulation to the eyes of the infant, which easily causes eye defects, parents generally look at a black-and-white card or a color card for the infant to promote the development of the visual nerves and the brain of the infant, and during the process of looking at the card for the infant, the parents need to hold the card by hands, keep the card at a position 20-43 cm away from the eyes of the infant, and switch the card, wherein the training time is about 20 minutes each time. The card is held in one posture all the time, so that the requirement on physical strength of parents is high, the labor intensity is high, and the people who are tired about carrying the baby feel frosted on the snow. There is no device capable of replacing a person to switch cards in the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the infant card early education machine which can replace a card held by a person, can automatically switch the card, reduces the burden of parents and relieves the fatigue of children in long family.
In order to solve the technical problem, the invention is solved by the following technical scheme: an infant card early education machine comprises a bracket, wherein a machine body with a card stacking containing cavity and a card display area is arranged on the bracket, a card outlet is arranged at one side of the card stacking containing cavity, a plurality of cards are arranged in the card stacking containing cavity, an elastic supporting mechanism for pushing the cards to the card outlet is arranged in the card stacking containing cavity, first guide grooves aligned with the card outlet are arranged at two sides of the card display area, a second guide groove connected with the first guide groove is also arranged in the machine body, an elastic switching mechanism for switching the connection of the first guide groove and the card outlet or the connection of the first guide groove and the second guide groove is arranged at the connection position of the second guide groove and the first guide groove, a slide rail is arranged in the machine body, a slide block is arranged on the slide rail in a sliding manner, and a driving mechanism for driving the slide block to move back and forth along the slide rail is also arranged in the, the sliding block is provided with a first magnet, the card is provided with a second magnet, and the sliding block slides and is attracted by the first magnet so as to pull the card out of the card outlet to the first guide groove. When the infant card early education machine is used, the cards are stacked and then placed into the card stacking containing cavity, and the card display area of the infant card early education machine is aligned to the front of an infant; the working process is as follows: when the sliding block is located at an initial position, the first magnet is attached to the second magnet, the driving mechanism drives the sliding block to slide, the first magnet attracts the second magnet to pull the card out of the card outlet to the first guide groove, the card pushes the elastic switching mechanism away and then enters the first guide groove in the pulling process until the card completely crosses the push-away elastic switching mechanism and then reaches the position, the elastic switching mechanism resets, the driving mechanism drives the sliding block to move reversely after a period of time, the sliding block sequentially pushes the card out along the first guide groove and the second guide groove, the card is guided to the second guide groove after pushing the elastic switching mechanism and slides along the second guide groove until the sliding block returns to the initial position, the card completely enters the second guide groove, and the first magnet is matched with the second magnet of the next card to realize automatic card replacement alternately; the card is held by a substitute, and the card can be automatically switched, so that the burden of parents is relieved, and the fatigue of children in the home length belt is relieved.
In the above technical solution, preferably, the driving mechanism includes a rack parallel to the slide rail, a first motor fixed to the slide block, and a gear, an output shaft of the first motor is connected with the gear, the gear is engaged with the rack, and the first motor rotates forward and backward to move the slide block back and forth on the slide rail. By adopting the structure, the gear can rotate forwards and backwards through the forward rotation and the reverse rotation of the first motor, so that the sliding block can move forwards or backwards on the sliding rail.
In the above technical solution, preferably, the machine body is rotatably connected to the support, and the machine body rotates to change the display angle of the card display area. Adopt this structure can change the angle of card show area through the mode that rotates the organism, make the card show area can be convenient adjust the angle that is fit for the baby and watches.
In the above technical solution, preferably, the first magnet is an electromagnet. The electromagnet is used as the first magnet, so that the attraction force of the first magnet to the second magnet is large enough, and the card can be smoothly pulled out from the card stacking cavity.
In the above technical solution, preferably, the machine body is provided with a lamp illuminating the card display area.
In the above technical scheme, preferably, the elastic support mechanism includes a support plate and a spring, the spring is arranged between the bottom surface of the card stacking cavity and the support plate, the side surface of the card stacking cavity is provided with a guide protrusion, and the side surface of the support plate is provided with a guide groove matched with the guide protrusion. When the card is placed, the card is placed between the elastic supporting mechanism and the top surface of the card stacking cavity, and the supporting plate pushes the card to the first conveying wheel through the elastic force of the spring.
In the above technical scheme, preferably, a speaker, a control chip, a memory and a camera for scanning the two-dimensional code are arranged on the machine body, and the control chip scans the two-dimensional code on the card through the camera, reads the corresponding voice file in the memory and sends the voice file out through the speaker. This structure cooperation card when using uses, the printing has the two-dimensional code on the card, the storage has the voice file in the memory, control chip is used for receiving and processing signal, the speaker is used for sending the voice file sound that the two-dimensional code corresponds, the position of camera installation corresponds with the position of two-dimensional code when the card gets into first guide way completely, the camera transmits to control chip when scanning the two-dimensional code, control chip reads the voice file in the memory, this voice file is broadcast out to control speaker, adopt this structure can carry out automatic voice stimulation and teaching to the baby in automatic visual stimulation, make early education effect better.
In the above technical solution, preferably, the memory is a removable usb disk. By adopting the structure, the memory can be detached, the voice file in the memory can be updated, and the new voice file can be conveniently stored in the U disk.
In the above technical scheme, preferably, a mobile phone fixing support or a slot is arranged on the body, a mobile phone is detachably arranged in the mobile phone fixing support or the slot, and the speaker, the control chip, the memory and the camera are all located on the mobile phone. Adopt this structure can be fixed the cell-phone to the organism on, carry out pronunciation sound production through speaker, control chip, memory and the camera in the cell-phone and through cell-phone APP control, need not these structures of installation in the organism, great reduction manufacturing cost under the prerequisite that does not influence the function.
In the above technical solution, preferably, the support is provided with a height adjusting mechanism. Due to the fact that the visual distances of infants in different months are different, the distance between the card display area and the eyes of the infants can be changed through adjustment of the height adjusting mechanism.
Compared with the prior art, the invention has the following beneficial effects: this kind of card early education machine for infant can replace the handheld card of people to can automatic switch-over card, alleviate the head of a family burden, alleviate family's long child's fatigue.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a schematic partial structure diagram of the machine body according to the embodiment of the invention.
Fig. 3 is a partial structural schematic view of a machine body according to another embodiment of the invention.
Fig. 4 is a partial structural schematic view of a machine body according to another embodiment of the invention.
Fig. 5 is a partial structural schematic view of a machine body according to still another embodiment of the invention.
Fig. 6 is a schematic cross-sectional structure diagram of the machine body in the embodiment of the invention.
Fig. 7 is a partially enlarged schematic structural diagram of the elastic switching mechanism in fig. 6.
Fig. 8 is a schematic diagram illustrating an operation process of the elastic switching mechanism according to the embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an elastic switching mechanism according to another embodiment of the present invention.
Fig. 10 is a schematic structural diagram of the machine body after rotating a certain angle in the embodiment of the present invention.
FIG. 11 is a schematic structural diagram of a card according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 11, an infant card early education machine includes a bracket 1, a machine body 4 having a card stacking chamber 2 and a card display area 3 is disposed on the bracket 1, a card outlet 21 is disposed on one side of the card stacking chamber 2, a plurality of cards 5 are disposed in the card stacking chamber 2, an elastic support mechanism 22 for pushing the cards 5 to the card outlet 21 is disposed in the card stacking chamber 2, first guide grooves 31 aligned with the card outlet 21 are disposed on two sides of the card display area 3, a second guide groove 32 connected with the first guide groove 31 is further disposed in the machine body 4, an elastic switching mechanism 6 for switching connection between the first guide groove 33 and the card outlet 21 or between the second guide groove 32 and the connection between the second guide groove 32 and the second guide groove 32 is disposed in the machine body 4, a slide rail 71 is disposed in the machine body 71, a slide block 72 is slidably disposed on the slide rail 71, and a driving mechanism 73 for driving the slide block 72 to move back and forth along the slide rail 71 is further disposed in the machine, the slider 72 is provided with a first magnet 74, the card 5 is provided with a second magnet 51, and the slider 72 slides and the first magnet 74 attracts the second magnet 51 to pull the card 5 out of the card outlet 21 to the first guide groove 31. In this embodiment, in order to ensure the attraction strength of the first magnet 74 to the second magnet 51, the first magnet 74 is an electromagnet.
In this embodiment, the driving mechanism 73 includes a rack 731 parallel to the slide rail 71, a first motor 732 fixed to the slider 72, and a gear 733, the gear 733 is connected to an output shaft of the first motor 732, the gear 733 is engaged with the rack 731, and the first motor 732 rotates forward and backward to move the slider 72 back and forth on the slide rail 71. The gear 733 is rotated forward and backward by the forward and backward rotation of the first motor 732, so that the slider 72 is moved forward or backward on the slide rail 71, and the body 4 includes a necessary control device for controlling the first motor 732.
Referring to fig. 4, another embodiment of the driving mechanism 73 for driving the sliding block 72 to move back and forth along the sliding rail 71 includes a timing belt 734 parallel to the sliding rail 71, the timing belt 734 is driven by a second motor 735, a shift lever 736 is disposed on the timing belt 734, a sliding slot 737 is disposed on the sliding block 72, the shift lever 736 is movably inserted into the sliding slot 737, the sliding slot 737 is vertically disposed, and a distance that the shift lever 736 can slide in the sliding slot 737 is greater than a distance that the shift lever 736 can slide on upper and lower surfaces of the timing belt 734.
Referring to fig. 5, a further embodiment of a driving mechanism 73 for driving the slider 72 to move back and forth along the slide rail 71, the driving mechanism 73 includes a screw 738 parallel to the slide rail 71, the screw 738 is in threaded engagement with the slider 72, the screw 738 is driven by a third motor 739, and the slider 72 can move back and forth on the slide rail 71 by the forward and backward rotation of the third motor 739.
Of course, besides the three embodiments described above, the skilled person can also devise several ways for driving the driving mechanism 73 for driving the sliding block 72 to move back and forth along the sliding track 71, and the applicant does not continue to list the possible embodiments, but these configurations should also fall within the scope of the present invention.
Referring to fig. 6 to 8, in the present embodiment, the elastic switching mechanism 6 is a rotatable guide arm, the middle portion of the guide arm is hinged to the machine body, and the lower end of the guide arm is attached to the lower groove surface of the first guide groove 31 and the upper end is attached to the lower groove surface of the second guide groove 32 through a torsion spring, when the infant card early teaching machine is used, the cards 5 are stacked and then placed in the card stacking cavity 2, and the card display area 3 of the infant card early teaching machine is aligned with the front surface of the infant; the working process is as follows: when the slide block 72 is located at the initial position, the first magnet 74 is attached to the second magnet 51, the first motor 732 rotates forward, the slide block 72 slides and is attracted by the first magnet 74 to pull the card 5 out of the card outlet to the first guide groove 31, in the pulling process, the card 5 pushes away the elastic switching mechanism 6 and then enters the first guide groove 31 until the card completely crosses the elastic switching mechanism 6 and then reaches the position and the elastic switching mechanism 6 resets, the first motor 732 rotates reversely to drive the slide block 72 to move reversely, the slide block 72 pushes the card out along the first guide groove 31 and the second guide groove 32 in sequence, the card 5 is guided to the second guide groove 32 after pushing against the elastic switching mechanism 6 and slides along the second guide groove 32 until the slide block 72 returns to the initial position, the card 5 completely enters the second guide groove 32, and the first magnet 74 is matched with the second magnet 51 of the next card 5, realizing automatic alternate card replacement; the card is held by a substitute, and the card can be automatically switched, so that the burden of parents is relieved, and the fatigue of children in the home length belt is relieved.
Referring to fig. 9, another embodiment of the elastic switching mechanism 6 is shown, in which the elastic switching mechanism 6 is a lower side wall of the second guide slot 32 which is elastic and movable, and the dotted line shows the position of the elastic switching mechanism 6 when the card 5 enters the first guide slot 31 after pushing the elastic switching mechanism 6.
In the present embodiment, the body 4 is rotatably connected to the bracket 1, and the body 4 rotates to change the display angle of the card display area 3. Adopt this structure can change the angle of card show area 3 through the mode that rotates organism 4, make the angle that is fit for the baby to watch that can be convenient adjusted in card show area 3.
In this embodiment, be provided with on the organism 4 and shine to the lamp 8 of card show area 3, lamp 8 is the LED lamp, and card show area 3 front side is equipped with the baffle, and lamp 8 installs in the baffle inboard, and when using, lamp 8 shines to card 5, keeps off through the baffle and guarantees that the light that lamp 8 sent is direct not to the baby eyes.
In this embodiment, the elastic supporting mechanism 22 includes a supporting plate 221 and a spring 222, the spring 222 is disposed between the bottom surface of the card stacking cavity 2 and the supporting plate 221, the side surface of the card stacking cavity 2 is provided with a guiding protrusion 23, and the side surface of the supporting plate 221 is provided with a guiding groove matched with the guiding protrusion 23.
In the embodiment, the body 4 is provided with a speaker 41, a control chip 42, a memory 43 and a camera 44 for scanning the two-dimensional code, and the control chip 42 scans the two-dimensional code 52 on the card 5 through the camera 44, reads the corresponding voice file in the memory 43 and emits the voice file from the speaker 41. This structure is used in cooperation with card 5 when using, see fig. 11, card 5 is last to be printed two-dimensional code 52 and pattern, in this embodiment, two-dimensional code 52 can be printed in the same side or the different side of pattern according to the position of camera 44, the pronunciation file has been stored in memory 43, control chip 42 is used for receiving and processing signal, speaker 41 is used for sending out the pronunciation file sound that two-dimensional code 52 corresponds, the position that camera 44 was installed corresponds with the position of two-dimensional code 52 when card 5 got into first guide way 413 completely, camera 44 transmits to control chip 42 when scanning two-dimensional code 52, control chip 42 reads the pronunciation file in memory 43, control speaker 41 broadcasts this pronunciation file, adopt this structure can carry out automatic pronunciation amazing and teaching to the baby in automatic visual stimulation, make the early education better effect.
In this embodiment, the memory 43 is a removable USB flash disk. By adopting the structure, the memory 43 can be detached, the voice file in the memory 43 can be updated, and the new voice file can be conveniently stored in the U disk.
Referring to fig. 3, in another embodiment of the automatic voice playing structure, a slot 45 is provided on the body 4, the mobile phone 9 is detachably disposed in the slot 45, and the speaker 41, the control chip 42, the memory 43 and the camera 44 are all located on the mobile phone 9. For more stable fixing of the mobile phone 9, a clip is provided on one side of the slot 45, but it is understood by those skilled in the art that the mobile phone 9 may be fixed by various mobile phone stands. Adopt this structure can be fixed cell-phone 9 to organism 4 on, carry out pronunciation sound production through speaker, control chip, memory and the camera in cell-phone 9 and through cell-phone APP control, need not to install these structures in organism 4, great reduction manufacturing cost under the prerequisite that does not influence the function.
The support 1 is provided with a height adjustment mechanism 10. Specifically, in this embodiment, the inner tube and the outer tube are nested with each other on the bracket 1, the inner tube is provided with a plurality of adjusting holes with different heights, the positioning hole with the same direction as the adjusting hole is provided in appearance, and the height of the height adjusting mechanism 10 can be changed after the positioning hole and one of the adjusting holes are fixed by a bolt and a nut.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides an infant uses card early education machine which characterized in that: comprises a bracket (1), a machine body (4) with a card stacking accommodating cavity (2) and a card display area (3) is arranged on the bracket (1), a card outlet (21) is arranged at one side of the card stacking accommodating cavity (2), a plurality of cards (5) are arranged in the card stacking accommodating cavity (2), an elastic supporting mechanism (22) for pushing the cards (5) to the card outlet (21) is arranged in the card stacking accommodating cavity (2), first guide grooves (31) aligned with the card outlet (21) are arranged at two sides of the card display area (3), a second guide groove (32) connected with the first guide groove (31) is further arranged in the machine body (4), an elastic switching mechanism (6) for switching the first guide groove (33) to be connected with the card outlet (21) or with the second guide groove (32) is arranged at the joint of the second guide groove (32) and the first guide groove (31), be provided with slide rail (71) in organism (4), slide rail (71) are gone up to slide and are provided with slider (72), still be provided with the drive in organism (4) slider (72) are followed slide rail (71) round trip movement's actuating mechanism (73), be provided with first magnet (74) on slider (72), be provided with second magnet (51) on card (5), slider (72) slide and by first magnet (74) are held second magnet (51) are in order to incite somebody to action card (5) are followed go out bayonet socket (21) and are pulled out extremely first guide way (31).
2. The infant card early education machine according to claim 1, wherein: the driving mechanism (73) comprises a rack (731) parallel to the sliding rail (71), a first motor (732) fixed on the sliding block (72) and a gear (733), the gear (733) is connected to an output shaft of the first motor (732), the gear (733) is meshed with the rack (731), and the first motor (732) rotates forwards and backwards to enable the sliding block (72) to move back and forth on the sliding rail (71).
3. The infant card early education machine according to claim 1, wherein: the card display device is characterized in that the machine body (4) is rotationally connected with the support (1), and the machine body (4) rotates to change the display angle of the card display area (3).
4. The infant card early education machine according to claim 1, wherein: the first magnet (74) is an electromagnet.
5. The infant card early education machine according to claim 1, wherein: and a lamp (8) irradiating the card display area (3) is arranged on the machine body (4).
6. The infant card early education machine according to claim 1, wherein: elastic support mechanism (22) include backup pad (221) and spring (222), spring (222) set up in the card stack chamber (2) bottom surface with between backup pad (221), the card is stacked and is held chamber (2) side and be provided with guide protrusion (23), backup pad (221) side be provided with guide protrusion (23) complex direction recess.
7. The infant card early education machine according to claim 1, wherein: the machine body (4) is provided with a loudspeaker (41), a control chip (42), a memory (43) and a camera (44) for scanning the two-dimensional code, the control chip (42) scans the two-dimensional code (52) on the card (5) through the camera (44), reads a corresponding voice file in the memory (43) and sends the voice file out through the loudspeaker (41).
8. The infant card early education machine according to claim 7, wherein: the memory (43) is a detachable USB flash disk.
9. The infant card early education machine according to claim 7, wherein: the mobile phone is characterized in that a mobile phone fixing support or a slot (45) is arranged on the machine body (4), a mobile phone (9) is detachably arranged in the mobile phone fixing support or the slot (45), and the loudspeaker (41), the control chip (42), the memory (43) and the camera (44) are all located on the mobile phone (9).
10. The early card education machine for infants according to any one of claims 1 to 9, wherein: the support (1) is provided with a height adjusting mechanism (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923776.6A CN111986527B (en) | 2020-09-04 | 2020-09-04 | Early education machine of card for infant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923776.6A CN111986527B (en) | 2020-09-04 | 2020-09-04 | Early education machine of card for infant |
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| CN111986527A true CN111986527A (en) | 2020-11-24 |
| CN111986527B CN111986527B (en) | 2022-06-10 |
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| WO2017107757A1 (en) * | 2015-12-21 | 2017-06-29 | 大连新锐天地传媒有限公司 | Early education machine system using cards |
| CN106295722A (en) * | 2016-07-27 | 2017-01-04 | 黄少龙 | A kind of card sending mechanism |
| CN206150704U (en) * | 2016-10-27 | 2017-05-10 | 深圳市智企科技有限公司 | Hand propelled card protection box |
| CN106601048A (en) * | 2017-01-12 | 2017-04-26 | 钱珅东 | Child literacy device |
| CN206893110U (en) * | 2017-04-05 | 2018-01-16 | 湖南省衡南县职业中等专业学校 | A kind of teaching aid |
| CN207264603U (en) * | 2017-06-10 | 2018-04-20 | 展凌云 | A kind of high interesting study device of English teaching |
| CN107808110A (en) * | 2017-10-27 | 2018-03-16 | 安徽硕威智能科技有限公司 | A kind of robot of telling a story with visual identity card |
| CN211062214U (en) * | 2018-11-03 | 2020-07-21 | 贵州省人民医院 | Teaching tool for medical English |
| CN209842977U (en) * | 2018-11-28 | 2019-12-24 | 黑龙江工程学院 | English word display device |
| CN210155878U (en) * | 2019-04-28 | 2020-03-17 | 广东机电职业技术学院 | Automatic page turning type early teaching machine |
| CN110950038A (en) * | 2019-12-30 | 2020-04-03 | 三佳泰克诺（天津）机械设备有限公司 | Multi-model automatic transmission line switching mechanism |
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