Learning clock and learning machine for children learning time concept interesting knowledge

Abstract

This invention relates to a children's learning machine that helps children recognize clock indications and learn about interesting natural phenomena related to time by manually moving the hour and minute hands. It includes a dial base with hour and minute scale values, a back cover, and hour and minute hands. The rear end of the hour hand passes through the main control circuit board and engages with an hour hand positioning disc. A conductive spring on the hour hand positioning disc makes conductive contact with an hour point conductive matrix. The inner end of the minute hand passes through the hour hand positioning disc and is fixed to it. A conductive spring on the minute hand positioning disc makes conductive contact with a minute point conductive matrix. The machine combines a clock dial, hour and minute hands, and a voice playback module, facilitating children's learning to recognize the time points indicated by the hour and minute hands. Additionally, the voice playback module allows children to learn interesting anecdotes related to certain specific time points.

Description

Technical Field

[0001] This utility model relates to a children's learning machine, and more particularly to a children's learning machine that can identify clocks and tell interesting things related to time. Background Technology

[0002] With social progress and the continuous development of science and technology, children today need to learn more and more as they grow up. In the past, children acquired basic common sense knowledge through exposure and observation, such as recognizing the time on a clock. Currently, there is no learning machine on the market specifically designed to help children learn to recognize clock times and understand time concepts. Therefore, it is essential to design a children's learning machine that can quickly identify clock times and also allow children to learn about time concepts and related anecdotes through voice. The time concepts and anecdotes include knowledge of natural phenomena, the concept of latitude and longitude in geography, and the biological clock patterns unique to humans and animals. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a children's learning machine that helps children recognize clock indications and learn interesting natural facts related to time by manually moving the hour and minute hands, and also helps them learn interesting knowledge containing the concept of time.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model relates to a children's learning machine that identifies clocks and teaches fun facts about time. It includes a casing, characterized in that: the casing includes a dial base plate with hour and minute scale values, and a rear cover plate fixedly connected to the dial base plate. An hour hand and a minute hand are arranged on the dial base plate. The rear end of the hour hand's needle holder passes through the main control circuit board from front to back and is fixedly connected to the hour hand positioning plate via an anti-foolproof engagement structure. The hour hand conductive spring on the hour hand positioning plate is conductively connected to the hour point conductive matrix disposed on the main control circuit board. The inner end of the minute hand's needle holder is inserted into the hour hand's needle holder and passes through the hour hand positioning plate from front to back, being fixedly connected to the minute hand positioning plate disposed behind the hour hand positioning plate. The minute hand conductive spring on the minute hand positioning plate is conductively connected to the minute point conductive matrix disposed on the main control circuit board. Both the hour point conductive matrix and the minute point conductive matrix are double-contact metal electrodes conductively connected to the main control circuit of the learning machine. Manually rotating the hour and minute hands can respectively:

[0006] ●The hour hand conductive spring switch is switched from one set of double-contact metal electrodes to another set of double-contact metal electrodes in the hour point conductive matrix;

[0007] ●The conductive spring contacts of the pointer switch from one set of dual-contact metal electrodes to another set of dual-contact metal electrodes in the point-conducting matrix;

[0008] When the hour and minute hand conductive springs remain on the corresponding set of double-contact metal electrodes for a set time, the main control circuit will announce the time indicated by the hour and minute hands, or the time and related interesting events in nature, through a voice player.

[0009] The outer diameter of the hour hand positioning disk is smaller than that of the minute hand positioning disk; both the hour point conductive matrix and the minute point conductive matrix are circular. The hour point conductive matrix consists of 12 double-contact metal electrodes, and the minute point conductive matrix consists of 60 double-contact metal electrodes. Each double-contact metal electrode is arranged in two rows in the radial direction and intermittently in the circumferential direction.

[0010] The hour and minute conductive springs are double springs made of elastic metal sheets and have a closed ring structure. The hour conductive spring is disposed on the front side of the hour positioning disc and is opposite to the hour point conductive matrix, and the minute conductive spring is disposed on the front side of the minute positioning disc and is opposite to the minute point conductive matrix.

[0011] The dial base plate has a toothed ring around the central pin hole. Between two adjacent teeth in the toothed ring is an arc-shaped recess for the hour hand positioning notch. There are a total of 12 hour hand positioning notches in the toothed ring. Correspondingly, an hour hand positioning protrusion with radial elasticity and capable of being embedded in the hour hand positioning notch is provided on the front side of the hour hand's needle tube clamp. When the hour hand is moved by hand, the hour hand positioning protrusion can slide from one hour hand positioning notch to another.

[0012] The rear side of the hour hand's needle tube clamp is a radially outwardly separated elastic hook plate. There are multiple elastic hook plates, at least two of which have different widths. Correspondingly, an hour hand positioning hole is provided in the center of the hour hand positioning disc, which allows the elastic hook plates to be locked in and the hour hand positioning disc to be fixedly connected together.

[0013] On the rear side of the minute hand positioning disc, there is a first minute hand positioning tooth ring with the same center as the center of the minute hand positioning disc. The teeth of the first minute hand positioning tooth ring protrude rearward in the axial direction of the minute hand positioning disc. Correspondingly, on the rear cover plate, in the circumferential direction opposite to the first minute hand positioning tooth ring, there is a first minute hand positioning protrusion with elastic properties that can be embedded in the tooth groove of the first minute hand positioning tooth ring. When the minute hand is moved by hand, the first minute hand positioning protrusion can slide from one tooth groove to another protrusion.

[0014] On the rear side of the minute hand positioning disc and outside the first minute hand positioning tooth ring, there is a second minute hand positioning tooth ring with the same center as the center of the minute hand positioning disc. The teeth of the second minute hand positioning tooth ring protrude outward in the radial direction of the minute hand positioning disc. Correspondingly, on the rear cover plate, in the circumferential direction opposite to the second minute hand positioning tooth ring, there is a second minute hand positioning protrusion with elastic properties that can be embedded in the tooth groove of the second minute hand positioning tooth ring. When the minute hand is moved by hand, the second minute hand positioning protrusion can slide from one tooth groove to another tooth groove.

[0015] The needle tube clamp of the needle is a pin with a cross shape and multiple side wing plates at the rear end. A screw hole is provided in the center of the pin. At least two of the side wings of the pin are foolproof locking structures that can be accurately positioned and assembled with the rear cover plate.

[0016] The anti-foolproof locking structure consists of a cylindrical protrusion on the rear end face of one side wing and a rectangular protrusion on the rear end face of the other side wing. Correspondingly, a rearwardly recessed "+"-shaped recessed cavity is provided on the front side of the rear cover plate opposite to the pin. A screw hole is provided in the center of the recessed cavity. A circular hole and a rectangular hole are provided at the position opposite to the anti-foolproof locking structure so that the cylindrical protrusion and the rectangular protrusion can be inserted into the hole.

[0017] The first and second minute hand positioning gear rings each have 60 tooth grooves.

[0018] This invention combines a clock face, hour hand, minute hand, and voice playback module, providing a convenient way for children to learn to identify the time points indicated by the hour and minute hands. When identifying the time, children simply move the hour and minute hands, and the voice playback module outputs the time point corresponding to the position indicated by those hands on the clock face. This combination of manual and auditory learning allows children to quickly recognize the time points indicated by the clock hands. Furthermore, the voice playback module can also provide information on interesting anecdotes related to certain specific time points, such as natural phenomena, the concepts of latitude and longitude in geography, fables and stories involving time from ancient and modern times, and the biological clock patterns unique to humans and animals. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the front of the children's learning machine of this utility model.

[0020] Figure 2 for Figure 1 A plan view.

[0021] Figure 3 for Figure 1 A 3D diagram of the back.

[0022] Figure 4 for Figure 1 An explosion diagram.

[0023] Figure 5 for Figure 3 An explosion diagram.

[0024] Figure 6 This is a schematic diagram showing the hour hand positioning disc, minute hand positioning disc, and back cover plate combined together.

[0025] Figure 7 for Figure 6 An explosion diagram.

[0026] Figure 8 for Figure 6 A diagram of an explosion viewed from behind.

[0027] Figure 9 for Figure 2 An enlarged schematic diagram of the needle insertion hole.

[0028] Figure 10 This is a magnified view of the clock hand from behind.

[0029] Figure 11 This is a magnified rear view of the minute hand.

[0030] The attached figures are labeled as follows:

[0031] 1. Dial base plate, 11. Pin mounting hole, 12. Hour hand positioning notch, 2. Hour hand, 21. Hour hand positioning protrusion, 22. Elastic hook plate, 3. Minute hand, 31. Pin post, 32. Screw hole, 33. Cylindrical protrusion, 34. Rectangular protrusion, 4. Main control circuit board, 41. Hour point conductive matrix, 42. Minute point conductive matrix, 43. Double contact metal electrode, 5. Hour hand positioning disc, 51. Hour hand positioning socket, 52. Hour hand conductive spring, 53. Guide ring, 6. Minute hand positioning disc, 61. Positioning cavity, 62. Recessed position, 63. Fastening screw hole, 64. Circular hole, 65. Rectangular hole, 66. Protrusion, 67. First minute hand positioning toothed ring, 68. Second minute hand positioning toothed ring, 69. Minute hand conductive spring, 7. Back cover plate, 71. Ear plate, 72. First minute hand positioning protrusion, 73. Second minute hand positioning protrusion, 8. Children's learning machine. Detailed Implementation

[0032] like Figures 1-11 As shown, this utility model's clock recognition and learning machine 8, which integrates a clock's pointer indicator with a voice learning device, is an electronic product that combines a clock's pointer indicator with a voice learning machine. It includes a dial base plate 1, an hour hand 2, a minute hand 3, a main control circuit board 4, an hour hand positioning disc 5, a minute hand positioning disc 6, a back cover 7, a rechargeable battery, a voice player, a switch, and mode buttons, etc., wherein:

[0033] The dial base plate 1 is mainly used to display the time and to install the hour hand 2 and minute hand 3;

[0034] The main control circuit board 4 is fixedly mounted on the rear side of the dial base plate 1 by screws (the direction pointing to the observer on the dial base plate 1 is front, and the back is rear). The main control circuit board 4 includes a microcontroller processor, a time point circuit module that identifies the time position pointed to by the hour hand 2 and the minute hand 3 (the time position refers to the hour point pointed to by the hour hand and the minute point pointed to by the minute hand), a voice circuit module that plays the time pointed to by the hour hand 2 and the minute hand 3 through voice, a charging module, a storage unit for relevant fables and interesting stories involving the concept of time, and a switching circuit and a mode switching circuit.

[0035] The mode switching circuit can be multi-channel, which can be switched by pressing a button for a certain length of time or by setting a sub-button. Multi-channel modes include voice broadcasting interesting anecdotes related to time, voice asking children where the hour and minute hands should point at a certain time, and telling them what people are usually doing at special times of the day.

[0036] The hour hand positioning disk 5 can rotate synchronously with the hour hand 2. When it rotates to a certain hour position, the hour hand conductive spring 52 on the hour hand positioning disk 5 immediately connects the time point circuit module corresponding to that hour position.

[0037] The minute hand positioning disk 6 can rotate synchronously with the minute hand 3. When it rotates to a certain minute position, the minute hand conductive spring 69 on the minute hand positioning disk 6 immediately connects the time point circuit module corresponding to that minute position.

[0038] The back cover 7 is fixed to the rear side of the dial base plate 1 by screws. It is also used to fix the hour hand positioning disc 5 and the minute hand positioning disc 6 to the main control circuit board 4.

[0039] The following is a detailed description of each component.

[0040] 1. Dial base plate 1, hour hand 2 and minute hand 3

[0041] 1. An hour and minute scale is provided on the front side of the dial base plate 1 (also referred to as the front surface of the dial base plate 1). A pin mounting hole 11 is provided on the dial base plate 1. Twelve scale values ​​representing the hour mark are arranged around the outside of the pin mounting hole 11. Five scale divisions representing the minute interval are arranged between two adjacent hour marks (see...). Figure 2 (As shown).

[0042] 2. Needle mounting hole 11 is used to mount the hour hand 2 and minute hand 3. The needle tube clamp of the hour hand 2 passes through the needle mounting hole 11 from front to back for mounting, and the needle tube clamp of the minute hand 3 passes through the needle tube clamp of the hour hand 2 from front to back for mounting (see...). Figure 1 , Figure 2 and Figure 9 (As shown).

[0043] 3. The hour hand is missing 12 (see...) Figure 9 , Figure 10 As shown, a toothed ring with a toothed structure is provided around the needle hole 11. An arc-shaped recess is formed between two adjacent tooth ridges in the toothed ring, referred to as the hour hand positioning notch 12. The toothed ring has a total of 12 hour hand positioning notches 12. Correspondingly, an hour hand positioning protrusion 21 is provided on the front side of the needle tube clamp of the hour hand 2 (also the root of the needle tube clamp). Preferably, there are two hour hand positioning protrusions 21 arranged opposite each other. The hour hand positioning protrusion 21 is elastic in the radial direction of the needle tube clamp of the hour hand 2. It separates part of the clamp wall from other clamp walls and provides an outward protrusion in the suspended part. When the hour hand 2 is installed on the needle hole 11, the hour hand positioning protrusion 21 is embedded in one of the hour hand positioning notches 12.

[0044] The purpose of setting the hour hand positioning notch 12 and the hour hand positioning convex 21 is to ensure that when the hour hand 2 is manually moved, it can accurately point to the hour mark value, avoiding the hour hand 2 pointing between two mark values. That is, due to the function of the hour hand positioning convex 21, when the hour hand 2 is manually moved, the elastic hour hand positioning convex 21 will not stay on the tooth ridge between the two hour hand positioning notches 12 when switching from one hour hand positioning notch 12 to another hour hand positioning notch 12. Instead, it will seek a stable state and automatically slide into the other hour hand positioning notch 12, and will also make a "click" sound.

[0045] 4. Hour hand 2

[0046] like Figure 1 , Figure 10 As shown, the hour hand 2 consists of a pointer and a needle clamp. The pointer is exposed outside the front side of the dial base plate 1. The needle clamp is inserted into the needle mounting hole 11. The rear end of the needle clamp passes through the needle mounting hole 11 and the main control circuit board 4 and is fixed to the hour hand positioning plate 5 through an anti-foolproof engagement structure. Specifically, the anti-foolproof engagement structure is as follows: the rear end of the needle clamp of the hour hand 2 has a radially outwardly separated elastic hook plate 22. There are multiple elastic hook plates 22, of which at least two elastic hook plates 22 have different widths. Correspondingly, the center of the hour hand positioning plate 5 is provided with an hour hand positioning insertion hole 51 (see [reference]) where the elastic hook plates 22 can be locked in and the hour hand 2 can be fixedly connected to the hour hand positioning plate 5. Figure 4 , Figure 5 (As shown).

[0047] The function of the anti-foolproof engagement structure is: when the hour hand 2 and the hour hand positioning disk 5 are connected together, it not only prevents the two from being misaligned, but also ensures that the time point pointed to by the hour hand 2 corresponds one-to-one with the matrix point in the time point conductive matrix 41 set in the time point circuit module through the hour hand conductive spring 52 on the hour hand positioning disk 5 (see...). Figures 4-8 (As shown).

[0048] 5. Minute hand 3

[0049] like Figure 1 , Figures 4-8 , Figure 11 As shown, the minute hand 3 is also composed of two parts: the pointer part and the needle tube clamp. The pointer part is exposed outside the front side of the dial base plate 1. The needle tube clamp of the minute hand 3 is inserted into the needle tube clamp of the hour hand 2. The rear end of the needle tube clamp of the minute hand 3 passes through the hour hand positioning plate 5 from front to back and is fixed to the minute hand positioning plate 6, which is located behind the hour hand positioning plate 5, through a foolproof locking structure. Specifically, the foolproof locking structure is as follows: the rear end of the needle tube clamp of the needle 3 is set as a pin 31 in the shape of a cross and with multiple side wings. A screw hole 32 is provided in the center of the pin 31. At least two of the side wings of the pin 31 have different structures on their rear end faces. Preferably, one side wing has a cylindrical protrusion 33 on its rear end face and a rectangular protrusion 34 on the rear end face of the other side wing. Correspondingly, a recessed position 62 is provided on the front side of the rear cover plate 7 that is attached to the needle positioning plate 6 and is opposite to the pin 31. The recessed position 62 is recessed and cross-shaped, allowing the rear end of the pin 31 to be fitted into it. A fastening screw hole 63 is provided in the center of the recessed position 62. A circular hole 64 and a rectangular hole 65 are provided in the position opposite to the foolproof locking structure, allowing the cylindrical protrusion 33 and the rectangular protrusion 34 to be fitted into them respectively.

[0050] The function of the anti-foolproof clamping structure is: when the minute hand 3 and the minute hand positioning disk 6 are connected together, it not only prevents the two from being misaligned, but also makes the time point pointed to by the minute hand 3 correspond one-to-one with the matrix point in the minute point conductive matrix 42 set in the time point circuit module through the minute hand conductive spring 69 on the minute hand positioning disk 6.

[0051] II. Main Control Circuit Board 4

[0052] like Figure 3 , Figures 4-8 As shown, a plurality of positioning posts with screw holes 32 are provided on the rear side of the dial base plate 1. Correspondingly, positioning holes that can be fitted onto the positioning posts are provided on the main control circuit board 4. The main control circuit board 4 is fixed to the rear side of the dial base plate 1 by screws.

[0053] The timing circuit module on the main control circuit board 4 includes a timing conductive matrix 41 and a minute conductive matrix 42 that are electrically connected to the microcontroller processor in the main control circuit. They are disposed on the rear side of the main control circuit board 4. Both the timing conductive matrix 41 and the minute conductive matrix 42 are annular rings with the same center as the pin hole 11. The timing conductive matrix 41 consists of 12 double-contact metal electrodes 43 (i.e., the aforementioned "matrix points in the timing conductive matrix 41"), which correspond to hour positions from 1 to 12 hours. The minute conductive matrix 42 consists of 60 double-contact metal electrodes 43 (i.e., the aforementioned "matrix points in the minute conductive matrix 42"), which correspond to minute positions from 1 to 60 minutes. Each double-contact metal electrode 43 is arranged in two rows in the radial direction and intermittently in the circumferential direction.

[0054] The main control circuit board 4 has a through hole that allows the needle clamps of the hour hand 2 and minute hand 3 to pass through and is concentric with the needle mounting hole 11.

[0055] The outer diameter of the time-point conductivity matrix 41 is smaller than the inner diameter of the point-point conductivity matrix 42.

[0056] By manually turning the hour hand (2) and minute hand (3), you can respectively:

[0057] ●The clockwise conductive spring 52 is switched from one set of dual-contact metal electrodes 43 to another set of dual-contact metal electrodes 43 in the clockwise conductive matrix 41;

[0058] ●The distributing conductive spring 69 is switched from one set of dual-contact metal electrodes 43 to another set of dual-contact metal electrodes 43 in the distributing conductive matrix 42;

[0059] When the hour hand conductive spring 52 and the minute hand conductive spring 69 remain on the corresponding set of double-contact metal electrodes 43 for a set time (e.g., 3 to 6 seconds), the main control circuit will announce the time point pointed to by the hour hand 2 and the minute hand 3, or the time point and related interesting events in nature, through the voice player.

[0060] The interesting facts about nature include natural phenomena, the concept of latitude and longitude in geography, fables and anecdotes about time from ancient and modern times, and the biological clock patterns unique to humans and animals. For example: the hour hand (2) points to 5 o'clock, the minute hand (3) points to 6 o'clock, and the voice player announces "5:30". Interesting facts about nature could be: usually around 5:30 in the morning, the rooster crows to remind people to get up and go to work; usually around 5:30 in the afternoon, adults are on their way home from get off work or to pick up their children from kindergarten.

[0061] III. Hour hand positioning dial 5

[0062] like Figures 4-8 As shown, the diameter of the hour hand positioning disc 5 is smaller than the diameter of the minute hand positioning disc 6, and it is located on the rear side of the main control circuit board 4.

[0063] 1. Front side of the hour hand positioning disc 5

[0064] The hour hand conductive spring 52 is fixedly installed in a recess on the front side of the hour hand positioning disk 5. The hour hand conductive spring 52 is a double spring made of elastic metal sheet and has a closed ring structure. When the hour hand conductive spring 52 touches a double contact metal electrode 43 in a point conductive matrix 41, the hour hand conductive spring 52 connects the separated double contact metal electrodes 43, so that the main control circuit receives the corresponding electrical signal and knows that the hour hand 2 is pointing to the hour position.

[0065] The hour hand positioning disc 5 has an irregularly shaped hour hand positioning hole 51 in the center for engaging with the rear end of the needle tube clamp of the hour hand 2.

[0066] The outer diameter of the hour point conductive matrix 41 is smaller than the outer diameter of the hour hand positioning disk 5, and the difference is preferably between 3mm and 10mm.

[0067] 2. The rear side of the hour hand positioning disc 5

[0068] A rearwardly extending, annular guide ring 53 is provided on the rear side of the hour hand positioning disc 5. The function of the guide ring 53 is to position and install the minute hand positioning disc 6 on the hour hand positioning disc 5 in a snap-on manner.

[0069] IV. Minute Hand Positioning Dial 6 (see below) Figures 4-8 (As shown)

[0070] 1. Front side of minute hand positioning disc 6

[0071] The minute hand positioning disc 6 has a rearwardly recessed positioning cavity 61 on its front side. This positioning cavity 61 fits snugly onto the hour hand positioning disc 5. The inner diameter of the positioning cavity 61 is slightly larger than the diameter of the hour hand positioning disc 5, with a difference of 0.5mm-1.0mm. The depth of the positioning cavity 61 is approximately equal to the thickness of the hour hand positioning disc 5. When the minute hand positioning disc 6 is mounted on the hour hand positioning disc 5, they can rotate relative to each other.

[0072] At the center of the positioning cavity 61 of the minute needle positioning disk 6, there is a "+" shaped recess 62 with a closed structure and a backward indentation. From the rear side of the minute needle positioning disk 6, the recess 62 is a cylindrical protrusion 66 that protrudes backward. The protrusion 66 has two positioning through holes and a fastening screw hole 63 that penetrate the protrusion 66 axially. The minute needle 3 and the minute needle positioning disk 6 can be fixed together coaxially by screwing the screw through the fastening screw hole 63 and screwing it into the screw hole 32 on the pin 31 of the minute needle 3.

[0073] Of the two positioning through holes, one is preferably a circular hole 64 and the other is a rectangular hole 65. The cylindrical protrusion 33 and the rectangular protrusion 34 in the anti-foolproof insert structure on the minute hand 3 are respectively inserted into the circular hole 64 and the rectangular hole 65.

[0074] The two positioning through holes serve to prevent misalignment when connecting the minute hand 3 and the minute hand positioning disk 6. They also ensure that the time point pointed to by the minute hand 3 corresponds one-to-one with the dual contact metal electrode 43 set in the minute point conductive matrix 42 through the minute hand conductive spring 69 on the minute hand positioning disk 6.

[0075] The minute hand conductive spring 69 has the same shape and structure as the hour hand conductive spring 52. It is located in a recess outside the positioning cavity 61 on the front side of the minute hand positioning disk 6. When the minute hand conductive spring 69 touches a double contact metal electrode 43 in a minute point conductive matrix 42, the minute hand conductive spring 69 connects the separated double contact metal electrodes 43, so that the main control circuit receives the corresponding electrical signal and knows how many minutes the minute hand 3 is pointing to.

[0076] The inner diameter of the point-conducting matrix 42 is larger than the outer diameter of the hour hand positioning disk 5, and the outer diameter of the point-conducting matrix 42 is smaller than the outer diameter of the minute hand positioning disk 6, with the difference preferably being 5mm-15mm.

[0077] 2. The rear side of the minute hand positioning plate 6

[0078] On the rear side of the minute needle positioning disc 6, the area opposite to the positioning cavity 61 is a rearward protruding truncated cone. Inside the truncated cone is a first minute needle positioning tooth ring 67 with the same center as the center of the minute needle positioning disc 6. The teeth of the first minute needle positioning tooth ring 67 protrude rearward in the axial direction of the minute needle positioning disc 6.

[0079] The periphery of the truncated cone is provided with a second minute needle positioning tooth ring 68, the teeth of which protrude outward in the radial direction of the minute needle positioning disk 6.

[0080] The first minute hand positioning toothed ring 67 and the second minute hand positioning toothed ring 68 each have 60 tooth grooves.

[0081] V. Rear Cover Plate 7

[0082] like Figures 3-8 As shown, ear plates 71 with screw holes are provided on both sides of the rear cover plate 7. The rear cover plate 7 can be fixed to the main control circuit board 4 by screws passing through the screw holes. A central through hole is provided in the center of the rear cover plate 7. The central through hole is used to embed the protrusion 66 on the rear side of the minute hand positioning disk 6, so as to further ensure that the hour hand 2, the hour hand positioning disk 5, the minute hand 3, the minute hand positioning disk 6 and the rear cover plate 7 are coaxially arranged.

[0083] The area on the front side of the rear cover plate 7 opposite to the minute needle positioning disc 6 is a circular cavity that is recessed and can be flipped onto the minute needle positioning disc 6. A first minute needle positioning protrusion 72 with elastic properties is provided on the side of the circular cavity opposite to the first minute needle positioning tooth ring 67 in the circumferential direction. When the minute needle 3 is moved by hand, the first minute needle positioning protrusion 72 can slide from one tooth ring 67 to another protrusion.

[0084] On the outer side of the circular cavity, a second minute needle positioning protrusion 73 with elastic properties is provided in the circumferential direction opposite to the second minute needle positioning tooth ring 68. When the minute needle 3 is moved by hand, the second minute needle positioning protrusion 73 can slide from one tooth ring 68 to another tooth ring 68.

[0085] The purpose of setting the second minute hand positioning toothed ring 68 is to further ensure that the minute hand conductive spring 69 stays on the corresponding double contact metal electrode 43 in the minute hand conductive matrix 42 when the minute hand 3 is turned.

Claims

1. A children's learning machine that identifies clocks and teaches fun facts about time, comprising a casing, characterized in that: The housing includes a dial base plate (1) with hour and minute scale values ​​and a back cover plate (7) fixedly connected to the dial base plate (1). The dial base plate (1) is provided with an hour hand (2) and a minute hand (3). The rear end of the needle tube clamp of the hour hand (2) passes through the main control circuit board (4) from front to back and is fixedly connected to the hour hand positioning plate (5) through a foolproof engagement structure. The hour hand conductive spring (52) on the hour hand positioning plate (5) is conductively contacted with the hour point conductive matrix (41) provided on the main control circuit board (4). The needle tube clamp of the minute hand (3) The needle clamp of the hour hand (2) is inserted into the inner end and passes through the hour hand positioning plate (5) from front to back, and is fixed to the minute hand positioning plate (6) located behind the hour hand positioning plate (5). The minute hand conductive spring (69) on the minute hand positioning plate (6) is conductively connected to the minute point conductive matrix (42) located on the main control circuit board (4). The hour point conductive matrix (41) and the minute point conductive matrix (42) are both double contact metal electrodes (43) conductively connected to the main control circuit of the learning machine. By manually turning the hour hand (2) and the minute hand (3), the following can be achieved: The clockwise conductive spring (52) is switched from one set of double-contact metal electrodes (43) to another set of double-contact metal electrodes (43) in the clockwise conductive matrix (41); The conductive spring (69) of the dividing needle is switched from one set of double contact metal electrodes (43) to another set of double contact metal electrodes (43) in the dividing point conductive matrix (42); When the hour hand conductive spring (52) and minute hand conductive spring (69) remain on a set time on a corresponding set of double-contact metal electrodes (43), the main control circuit will broadcast the time point indicated by the hour hand (2) and minute hand (3) or the time point and related interesting events in nature through a voice player.

2. The children's learning machine that identifies clocks and teaches fun facts about time concepts according to claim 1, characterized in that: The outer diameter of the hour hand positioning disk (5) is smaller than the outer diameter of the minute hand positioning disk (6); the hour point conductive matrix (41) and the minute point conductive matrix (42) are both circular. The hour point conductive matrix (41) consists of 12 double-contact metal electrodes (43), and the minute point conductive matrix (42) consists of 60 double-contact metal electrodes (43). Each double-contact metal electrode (43) is arranged in two rows in the radial direction and intermittently in the circumferential direction.

3. The children's learning machine for recognizing clocks and learning interesting facts about time concepts as described in claim 2, characterized in that: The hour hand conductive spring (52) and minute hand conductive spring (69) are double springs made of elastic metal sheet material and have a closed ring structure; the hour hand conductive spring (52) is disposed on the front side of the hour hand positioning disk (5) and is opposite to the hour point conductive matrix (41), and the minute hand conductive spring (69) is disposed on the front side of the minute hand positioning disk (6) and is opposite to the minute point conductive matrix (42).

4. The children's learning machine for recognizing clocks and learning interesting facts about time concepts as described in claim 3, characterized in that: The dial base plate (1) has a toothed ring around the central pin hole (11). Between two adjacent teeth in the toothed ring is an arc-shaped recess for the hour hand positioning notch (12). There are a total of 12 hour hand positioning notches (12) in the toothed ring. Correspondingly, an hour hand positioning protrusion (21) with radial elasticity and capable of being embedded in the hour hand positioning notch (12) is provided on the front side of the needle tube clamp of the hour hand (2). When the hour hand (2) is moved by hand, the hour hand positioning protrusion (21) can slide from one hour hand positioning notch (12) to another hour hand positioning notch (12).

5. The children's learning machine for recognizing clocks and learning interesting facts about time concepts as described in claim 4, characterized in that: The rear side of the needle tube clamp of the hour hand (2) is a flexible hook plate (22) that is separated radially outward. The flexible hook plate (22) is made of multiple pieces, of which at least two flexible hook plates (22) have different widths. Correspondingly, an hour hand positioning hole (51) is provided in the center of the hour hand positioning plate (5) so that the flexible hook plate (22) can be locked in it and the hour hand (2) can be fixedly connected to the hour hand positioning plate (5).

6. The children's learning machine for recognizing clocks and learning interesting facts about time concepts as described in claim 3, characterized in that: On the rear side of the minute hand positioning disc (6), there is a first minute hand positioning tooth ring (67) with the same center as the center of the minute hand positioning disc (6). The teeth of the first minute hand positioning tooth ring (67) protrude backward in the axial direction of the minute hand positioning disc (6). Correspondingly, on the rear cover plate (7), in the circumferential direction opposite to the first minute hand positioning tooth ring (67), there is a first minute hand positioning protrusion (72) with elastic properties that can be embedded in the tooth groove of the first minute hand positioning tooth ring (67). When the minute hand (3) is moved by hand, the first minute hand positioning protrusion (72) can slide from one tooth groove to another protrusion.

7. The children's learning machine for recognizing clocks and learning interesting facts about time concepts as described in claim 6, characterized in that: On the rear side of the minute hand positioning disc (6) and outside the first minute hand positioning toothed ring (67), there is a second minute hand positioning toothed ring (68) with the same center as the center of the minute hand positioning disc (6). The teeth of the second minute hand positioning toothed ring (68) protrude outward in the radial direction of the minute hand positioning disc (6). Correspondingly, on the rear cover plate (7), in the circumferential direction opposite to the second minute hand positioning toothed ring (68), there is a second minute hand positioning protrusion (73) with elastic properties that can be embedded in the tooth groove of the second minute hand positioning toothed ring (68). When the minute hand (3) is moved by hand, the second minute hand positioning protrusion (73) can slide from one tooth groove to another tooth groove.

8. The children's learning machine for recognizing clocks and learning interesting facts about time concepts according to claim 7, characterized in that: The needle tube clamp of the needle (3) is a pin (31) with a "+" shape and multiple side wing plates at the rear end. A screw hole (32) is provided in the center of the pin (31). At least two of the side wings of the pin (31) are anti-foolproof clamping structures that can be accurately positioned and assembled with the rear cover plate (7).

9. The children's learning machine for recognizing clocks and learning interesting facts about time concepts as described in claim 8, characterized in that: The anti-foolproof locking structure consists of a cylindrical protrusion (33) on the rear end face of one side wing and a rectangular protrusion (34) on the rear end face of the other side wing. Correspondingly, a recessed cavity in the shape of a cross is provided on the front side of the rear cover plate (7) opposite to the pin (31). A screw hole (32) is provided in the center of the recessed cavity. The cylindrical protrusion (33) and the rectangular protrusion are positioned opposite to the anti-foolproof locking structure so that the cylindrical protrusion (33) and the rectangular protrusion can be inserted into the circular hole and the rectangular hole (65) respectively.

10. The children's learning machine for recognizing clocks and learning interesting facts about time concepts according to claim 7, characterized in that: The first minute hand positioning tooth ring (67) and the second minute hand positioning tooth ring (68) each have 60 tooth grooves.

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