Robot head capable of changing expressions

Abstract

The utility model relates to the technical field of robots, in particular to a robot head capable of changing expressions. The face part is provided with a mounting groove; the expression paster is embedded into the mounting groove; the upper surface of the expression paster is recessed in the mounting groove; a magnetic attraction part is arranged in the mounting groove; a pushing mechanism is arranged in the head part, and the pushing mechanism is triggered to provide pushing force for the face patch; the upper surface of the expression paster is the surface, with patterns, of the expression paster. The expression paster is completely sunk into the face and does not protrude out of the face, so that the outer side of the installed expression paster cannot provide a stress position for picking, and the expression paster does not fall off due to accidental operations such as touch and friction. The expression paster is ejected out from the inner cavity of the head by pulling the nose pushing mechanism of the robot, the appearance of a product is not affected, and meanwhile the expression paster can be taken down very conveniently and rapidly.

Description

TECHNICAL FIELD

[0001] The utility model relates to robot technical field especially a robot head part of expression can be changed. BACKGROUND

[0002] The expression replaceable robot not only can bring more interesting for children, but also can prolong their freshness and interest to the robot. Through different expression changes, children can have more rich interaction with the robot, thereby improving their participation and emotional connection. This design is particularly important for children's toys and educational robots, because it can stimulate children's creativity and curiosity.

[0003] The common expression replacement mode is: magnetic attraction mode, different pattern eye patches are fixed on the robot through magnets, the operation is relatively simple and has good reusability, and it is not easy to be damaged, and children can easily change expressions. However, the magnetic attraction mode also has its limitations, especially the strength problem of the magnet connection. If the magnetic force is insufficient, the expression is easy to fall off, which affects the use experience; if the magnetic field is too strong, other problems may be caused.

[0004] It should be noted that the magnetic attraction connection cannot use too strong magnets. First, too strong magnetic field may interfere with the electronic components inside the robot, affecting its normal function. For example, strong magnetic field may damage the accuracy of the sensor or affect the stability of the circuit, thereby causing the robot to work abnormally. Secondly, using strong magnets will significantly increase the cost, and the price of strong magnetic material is much higher than that of ordinary magnets, which will increase the manufacturing cost of the product by several times, thereby affecting the market pricing and competitiveness. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a robot head part of expression can be changed, including: face with installation groove;

[0006] Expression patch, the expression patch is embedded in the installation groove;

[0007] Among them, the upper surface of the expression patch is recessed in the installation groove

[0008] Among them, the installation groove has a magnetic attraction component;

[0009] Among them, the head is provided with a pushing mechanism, and the pushing mechanism provides a pushing force for the face patch;

[0010] The upper surface of the expression patch is that the expression patch has a patterned surface.

[0011] Further, the bottom of the installation groove has a through hole;

[0012] The pushing mechanism comprises:

[0013] a sliding pull rod, which is slidably connected with the face, a sliding direction being perpendicular to a front view plane of the face, and one end of the sliding pull rod protruding from the face;

[0014] a pushing arm, both ends of which pass through the through hole and abut against the left and right expression patches;

[0015] wherein the sliding pull rod is fixedly connected with the pushing arm.

[0016] Further, the part of the face where the sliding pull rod protrudes is a nose connecting part.

[0017] Further, the pushing mechanism further comprises a reset spring sleeved on the sliding pull rod.

[0018] Both ends of the reset spring abut against the inner wall surface of the head and the pushing arm, respectively.

[0019] The nose connecting part abuts against the face.

[0020] Further, the pushing arm forms an abutting point A with each expression patch, and at least three abutting point As are formed in each expression patch, and a plurality of abutting point As are uniformly dispersed in the edge area of the expression patch.

[0021] Further, the pushing arm forms an abutting point B with each expression patch, and the abutting point B is located in the edge area of the expression patch.

[0022] The center area of the magnetic field formed by the magnetic attraction part is away from the center area of the expression patch and close to the abutting point B.

[0023] Further, the nose connecting part is provided with a connecting hole perpendicular to the axis of the sliding pull rod.

[0024] The nose is provided with a connecting pin inserted into the connecting hole.

[0025] Further, the projection of the nose connecting part towards the front view plane is a rectangle, a length of the projection being A1 and a width of the projection being B1.

[0026] The face is provided with a rectangular hole, a length of the rectangular hole being A2 and a width of the rectangular hole being B2.

[0027] A2>A1>B2>B1.

[0028] Further, the surface of the rectangular hole position of the face is provided with a positioning groove.

[0029] After the nose connecting part passes through the rectangular hole, the nose connecting part is rotated to couple with the positioning groove.

[0030] Furthermore, the inner wall surface of the face has a connection part A, and the push arm has a connection part B; the two ends of the return spring are respectively connected to the connection part A and the connection part B;

[0031] When the return spring is in a released state, the nose connecting portion protrudes from the rectangular hole;

[0032] The inner wall surface of the face is: the wall surface of the face facing the inner cavity of the head.

[0033] The beneficial effects of this utility model are reflected in the fact that the expression patch is embedded in the installation groove on the face, and the magnetic attraction component in the installation groove attracts the expression patch, ensuring that the expression patch is completely embedded in the face and does not protrude at all. As a result, the outer side of the installed expression patch cannot provide a force-bearing position for removal, and the expression patch will not fall due to accidental operation such as touching or friction. By pulling the nose push mechanism of the robot, the expression patch is ejected from the inner cavity of the head, which does not affect the appearance of the product and allows for very convenient and quick removal of the expression patch. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of a robot head with changeable expressions provided by the present invention;

[0035] Figure 2 This is a front view of a robot head with changeable expressions provided by the present invention;

[0036] Figure 3 A schematic diagram of the relationship between the nose and the nose connection portion provided by the present invention;

[0037] Figure 4 This is a schematic diagram of the pushing mechanism for forming the abutment point A provided by the present invention;

[0038] Figure 5 for Figure 4 Structural diagram from another perspective;

[0039] Figure 6 This is a schematic diagram of the pushing mechanism for forming the abutment point B provided by the present invention;

[0040] Figure 7 for Figure 6 Structural diagram from another perspective;

[0041] Figure 8 Schematic diagram of the relationship between the nose connection part and the rectangular hole.

[0042] 1, face; 11, mounting groove; 111, magnetic component; 12, nose; 121, connecting pin; 13, rectangular hole; 14, positioning groove; 2, expression patch; 3, pushing mechanism; 31, sliding pull rod; 311, nose connecting part; 3111, connecting hole; 32, pushing arm; 321, abutting point A; 322, abutting point B; 33, reset spring; 331, connecting part A; 332, connecting part B. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0044] Embodiment 1

[0045] Reference Figure 1 - Figure 8 .

[0046] A robot head with replaceable expressions comprises: a head with a mounting groove 11;

[0047] An expression patch 2 is embedded in the mounting groove 11;

[0048] The upper surface of the expression patch 2 is recessed in the mounting groove 11

[0049] The mounting groove 11 has a magnetic component 111;

[0050] The head is provided with a pushing mechanism 3, and triggering the pushing mechanism 3 provides a pushing force for the face 1 patch.

[0051] In the prior art, a robot head with replaceable expressions is made by magnetic attraction. The robot face 1 is provided with a magnet, and the expression patch 2 is provided as an iron sheet, which is then directly attracted to the magnet. First, based on the consideration of aesthetics, the robot face 1 and the expression patch 2 are curved surfaces rather than flat surfaces, and the expression patch 2 is directly formed by patch stamping. This results in low adhesion of the expression patch 2 to the robot face 1, and the edges of the expression patch 2 inevitably curl up, affecting the product aesthetics and producing a rough, cheap feeling that reduces the user's desire to purchase. In order to facilitate the removal of the expression patch 2, the expression patch 2 protrudes from the surface of the face 1, so that the user can directly apply force to the edge of the expression patch 2 to replace other expression patches 2.

[0052] In the case that the magnetic force of the originally connected expression patch 2 is not large, the child is easy to touch the expression patch 2 when playing with the robot, causing the expression patch 2 to slide and thus to be separated from the magnetic attraction range. Specifically, the friction between the user's hand or other objects and the expression patch 2 drives the expression patch 2 to slide, and when the expression patch 2 slides a certain distance, the expression patch 2 will be out of the magnetic field range of the magnetic attraction component 111, or the object is inserted into the position of the warped edge of the expression patch 2 to directly warp the expression patch 2. The edge of the expression patch 2 is blocked by the mounting groove 11, and in this unintentional removal of the expression patch 2, it is very easy to cause the expression patch 2 to be lost, affecting the user experience.

[0053] To this end, the application provides a connection mode of the expression patch 2 which is not easy to fall off, specifically, the robot head is provided with a mounting groove 11, and the expression patch 2 is embedded in the mounting groove 11, and the mounting groove 11 is gap-fitted with the expression patch 2, without the need for the mounting groove 11 to be clamped with the expression patch 2 to fix the expression patch 2, and the upper surface of the expression patch 2 is recessed in the mounting groove 11. The upper surface of the expression patch 2 refers to the side exposed after installation, that is, the expression patch 2 is completely immersed in the mounting groove 11.

[0054] The edge of the expression patch 2 is blocked by the sidewall of the mounting groove 11, the mounting groove 11 limits the sliding of the expression patch 2, and the expression patch 2 is completely immersed in the mounting groove 11, so there is no gap for objects to be inserted, and the upper surface of the expression patch 2 is a complete curved surface, so there is no position for external objects to grab and apply a pulling force to the expression patch 2, ensuring that there is no force position for the user to apply a force to the expression patch 2 to move away from the magnetic component.

[0055] At this time, the connection strength of the expression patch 2 and the head has not been improved, so high-quality magnetic attraction components 111 do not need to be used in the production structure, reducing the production difficulty and cost. And when removing the expression patch 2, a large force is not needed to overcome the attraction force of the magnetic attraction component 111 to remove the expression patch 2.

[0056] Specifically, the expression patch 2 is removed by the push mechanism 3 provided in the head to push the expression patch 2 out from the inside, and the push mechanism 3 combines the weak magnetic characteristics of the magnetic attraction component 111 to ensure that the push mechanism 3 can easily remove the expression patch 2.

[0057] Embodiment 2

[0058] Reference Figure 3 - Figure 8 .

[0059] The bottom of the mounting groove 11 has a through hole;

[0060] The push mechanism 3 comprises:

[0061] A sliding rod 31 is slidably connected to the face 1 , with a sliding direction perpendicular to the front view plane of the face 1 , and one end of the sliding rod 31 protrudes from the face 1 ;

[0062] A pushing arm 32, both ends of which pass through the through hole and abut against the expression patches 2 on the left and right sides;

[0063] The sliding rod 31 is fixedly connected to the pushing arm 32 .

[0064] The pushing mechanism 3 specifically includes a sliding rod 31 and a pushing arm 32. The sliding rod 31 can actually be integrally formed into a roughly T-shape. Since the expression changes are mainly reflected in the eyes, the expression patch 2 generally has two eyes. Therefore, the corresponding ends of the pushing arm 32 abut the two expression patches 2, and then the middle section of the pushing arm 32 extends to form the sliding rod 31. The sliding rod 31 passes through the face 1 and is slidably connected to the face 1. The sliding direction is perpendicular to the front view plane of the face 1, which is the plane facing the face 1.

[0065] Specifically, pinch the position of the sliding rod 31 protruding from the face 1 with your hand, and use the sliding rod 31 to drive the pushing arm 32 to push the expression patch 2 away from the magnetic component 111, so that the expression patch 2 can be removed.

[0066] Furthermore, the portion of the sliding rod 31 protruding from the face 1 is configured as a nose connection portion 311 for connecting to the nose 12, which is located exactly on the axis of symmetry between the left and right eyes (expression patch 2). The nose 12 is typically inserted vertically into the face 1 using a pin. While the original location where the nose 12 connects to the face 1 requires a hole, the hole originally used for the nose 12 is now configured to pass through the sliding rod 31.

[0067] Furthermore, Figure 7 As shown, the pushing mechanism 3 further includes a return spring 33 which is sleeved on the sliding rod 31 , and two ends of the return spring 33 respectively abut against the inner wall surface of the head and the pushing arm 32 .

[0068] The sliding rod 31 is passed directly through the face 1, and there is almost no resistance during the sliding process of the sliding rod 31 (the hole in the face 1 must be larger than the sliding rod 31. To obtain the proper damping feeling of the sliding rod 31, the hole in the face 1 must be processed with very high precision, and it is too expensive to achieve such precision with injection molded parts). This causes the sliding rod to slide freely and easily fall into the head; and after removing the expression patch 2, the pushing mechanism 3 protrudes from the face 1, and the pushing mechanism 3 needs to be pushed back, which increases the operation steps of replacing the expression patch 2 and affects the user experience.

[0069] To this embodiment, the reset spring 33 is added, and the size of the nose connecting part 311 can abut against the face 1.

[0070] Specifically, the nose connecting part 311 can pass through the inner diameter of the reset spring 33, the reset spring 33 is sleeved on the sliding pull rod 31, the nose connecting part 311 passes through the face 1 from the inner side of the face 1, the inner wall of the face 1 and the push arm 32 extrude the reset spring 33, expand or rotate the nose connecting part 311 so that the nose connecting part 311 cannot re-enter the hole of the face 1, make the nose connecting part 311 abut against the face 1, and finally assemble the face 1 and the head. Pull the sliding pull rod 31, the push arm 32 extrudes the reset spring 33, loosen the sliding pull rod 31, the reset spring 33 is elongated to push the push arm 32 and drive the sliding pull rod 31 to reset, so that the nose connecting part 311 abuts against the face 1.

[0071] More specifically, the sliding pull rod 31 and the push arm 32 can be integrally formed by metal bending, such as Figure 3 and 8 As shown in the drawings, the middle bending position of the sliding pull rod 31 forms a connecting hole 3111. The nose 12 is provided with a connecting pin 121. In the prior art, the nose 12 is inserted into the face 1 through the connecting pin 121. In the present application, the connecting pin 121 is inserted into the connecting hole 3111. The axis of the connecting hole 3111 is perpendicular to the axis of the sliding pull rod 31, and the axis of the connecting hole 3111 is parallel to the height direction of the robot, which is the best effect. The nose 12 is inserted into the connecting hole 3111 from top to bottom, and the end of the connecting pin 121 is located below. In general, it is difficult to find the existence of the connecting pin 121 under the normal angle of view, which ensures that the structure will not affect the aesthetics of the product. At the same time, the nose 12 can also be used as a replaceable part, such as replacing the nose 12 of different colors.

[0072] The sliding pull rod 31 and the push arm 32 are formed by metal bending. The nose connecting part 311 is actually a hole formed by surrounding the sheet metal. Therefore, the projection of the nose connecting part 311 towards the front plane is naturally rectangular. Figure 8 As shown in the drawings, the length of the projection is A1, and the width of the projection is B1. The face 1 is provided with a rectangular hole 13, the length of the rectangular hole 13 is A2, and the width of the rectangular hole 13 is B2. A2>A1>B2>B1. That is, when the long side of the nose connecting part 311 is parallel to the long side of the rectangular hole 13 (at this time the width of the two is naturally parallel), the nose connecting part 311 can pass through the rectangular hole 13. When the long side of the nose connecting part 311 is parallel to the width of the rectangular hole 13, the nose connecting part 311 cannot pass through the rectangular hole 13, and abuts against the face 1 to resist the pulling force of the reset spring 33.

[0073] Further, as shown in the drawings, Figure 8 The face 1 is provided with a positioning groove 14 at the position of the rectangular hole 13.

[0074] The nose connecting part 311 is coupled with the positioning groove 14 after rotating through the rectangular hole 13. It has been explained above that the nose connecting part 311 can pass through the rectangular hole 13 at a certain angle. When the product is assembled, the nose connecting part 311 passes through the rectangular hole 13 to connect the pushing mechanism 3 with the face 1. After the product is assembled, the nose connecting part 311 does not need to pass through the rectangular hole 13 again. If the nose 12 and the face 1 pass through the rectangular hole 13 again, the pushing mechanism 3 can fall into the head.

[0075] The face 1 is provided with a positioning groove 14 on the surface of the position of the rectangular hole 13. When the product is assembled, the outer wall surface of the nose connecting part 311 is coupled with the positioning groove 14. The nose connecting part 311 is embedded in the positioning groove 14, which can effectively prevent the nose connecting part 311 from rotating and entering the rectangular hole 13, and also prevent the nose 12 from moving.

[0076] Furthermore, the inner wall surface of the face 1 is provided with a connecting part A 331, and the pushing arm 32 is provided with a connecting part B 332. The two ends of the reset spring 33 are connected with the connecting part A 331 and the connecting part B 332 respectively.

[0077] The nose connecting part 311 protrudes from the rectangular hole 13 in the released state of the reset spring 33. The inner wall surface of the face 1 is the wall surface of the face 1 facing the inner cavity of the head.

[0078] When the child plays with the product of the present application, it is possible to disassemble the nose 12 and rotate the nose connecting part 311 to push the pushing mechanism 3 into the inner cavity of the head. In order to prevent this situation, the two ends of the reset spring 33 are connected with the inner wall of the face 1 and the pushing arm 32 respectively. The connecting part A 331 and the connecting part B 332 can be in the form of a C-shaped plate, and the reset spring 33 can be inserted into the opening position along the radial direction of the reset spring 33. The two ends of the reset spring 33 can also be directly glued to the connecting part A 331 and the connecting part B 332. The nose connecting part 311 protrudes from the rectangular hole 13 in the released state of the reset spring 33. That is, when the nose connecting part 311 is pressed, the reset spring 33 is elongated, and after the pressing is stopped, the reset spring 33 is contracted to push out the nose connecting part 311. When the nose connecting part 311 is rotated, the reset spring 33 has been deformed, and the reset spring 33 will rotate the nose connecting part 311 back to the original angle when the connecting part A 331 and the connecting part B 332 are in the form of glue.

[0079] Embodiment 3

[0080] Reference Figure 5 .

[0081] The pushing arm 32 forms an abutting point A321 with each expression sticker 2, and at least three abutting points A321 are formed in each expression sticker 2. The abutting points A321 are evenly distributed in the edge area of the expression sticker 2.

[0082] The expression sticker 2 is magnetically attracted to the face 1. When there is only one or two abutting points A321, one end of the expression sticker 2 will be raised first, and the other end will still be connected to the magnetic component 111. If the sliding pull rod 31 is released at this time, the expression sticker 2 will be immediately reset by the magnetic component 111. Therefore, it is necessary to peel off the expression sticker 2 with the other hand while pulling the sliding pull rod 31, making the process of replacing the expression sticker 2 very cumbersome. In this embodiment, multiple abutting points A321 are provided, and the expression sticker 2 is evenly stressed, so that the expression sticker 2 is directly peeled off by moving the whole expression sticker 2, avoiding the situation that one end of the expression sticker 2 is raised and the other end is still connected to the magnetic component 111.

[0083] Embodiment 4

[0084] Reference Figure 6 and Figure 7

[0085] The pushing arm 32 forms an abutting point B322 with each expression sticker 2; the abutting point B322 is located in the edge area of the expression sticker 2.

[0086] The center area of the magnetic field formed by the magnetic component 111 is away from the center area of the expression sticker 2, and close to the abutting point B322.

[0087] The same problem as in Example 3 occurs when one abutment point is formed, which causes one end to be raised first, while the other end is still connected to the magnetic component 111. To solve this problem, another solution is provided in this embodiment. One end of the pushing arm 32 and one expression sticker 2 form an abutment point B322. When the pushing arm 32 pushes the expression sticker 2, the expression sticker 2 is raised at one end and is magnetically attracted at the other end. In this embodiment, the magnetic component 111 is arranged such that the center of the magnetic field is close to the abutment point B322. In other words, the magnetic component 111 is not uniformly arranged around the expression sticker 2, but the volume of the magnetic component 111 close to the side of the abutment point B322 is larger. When the expression sticker 2 is placed in the mounting groove 11, it is not only attracted towards the bottom surface of the mounting groove 11, but also towards the side wall surface of the mounting groove 11. When the expression sticker 2 is raised, the edge of the expression sticker 2 is no longer blocked by the side wall of the mounting groove 11, and the side of the expression sticker 2 close to the abutment point B322 slides onto the edge of the mounting groove 11 (the surface of the face 1) due to the magnetic attraction. Subsequently, even if the pulling force on the pushing mechanism 3 is removed, the user can still freely remove the expression sticker 2. This form of structure can use one end of the expression sticker 2 as a fulcrum to form a force-saving lever, which can more easily overcome the magnetic attraction of the magnetic component 111 to lift one end of the expression sticker 2 (in the structure of Example 3, the expression sticker 2 is directly pulled away from the magnetic component 111). More easily overcoming the magnetic attraction is not simply that the user can remove the expression sticker 2 with a small force, but rather that the force on the sliding pull rod 31 and the pushing arm 32 is reduced. The connection position between the pushing arm 32 and the sliding pull rod 31 is a right angle, and the pushing arm 32 and the sliding pull rod 31 can be considered as two parts of one part. When the pushing arm 32 pushes the expression sticker 2, stress concentration occurs at the corner position of the pushing arm 32 and the sliding pull rod 31, which causes deformation of the pushing arm 32 and the sliding pull rod 31. More travel of the sliding pull rod 31 is required to push the expression sticker 2 out, and the robot head also has other electronic components, which cannot be wasted for the travel of the pushing mechanism 3. In addition, if the structural strength of the pushing arm 32 and the sliding pull rod 31 is not good, there may be problems such as breakage or plastic deformation. Therefore, the structure in Example 3 has a higher requirement for the structural strength of the pushing mechanism 3 (the sliding pull rod 31 and the pushing arm 32), which corresponds to a higher cost.

[0088] In the description of the embodiments of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top part", "bottom part", "inner", "outer", "inner side", "outer side" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as a limitation on the utility model that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the utility model. Among them, "inside" refers to the inside or the enclosed area or space. "Periphery" refers to the area around a certain component or a certain area.

[0089] In the description of the embodiments of the utility model, the terms "first", "second", "third", "fourth" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third", "fourth" can be explicitly or implicitly included one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0090] In the description of the embodiments of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "assembly" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0091] In the description of the embodiments of the utility model, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable way.

[0092] In the description of the embodiments of the utility model, it needs to be understood that "-" and "~" represent two different ranges of values, and the range includes the end point. For example: "A-B" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0093] In the description of the embodiments of the utility model, the term "and / or" in this paper only describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that there are three kinds of situations: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0094] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An expression changeable robot head, characterized by, The expression sticker is embedded in the mounting groove The upper surface of the expression sticker is recessed in the mounting groove The mounting groove has a magnetic component The head is provided with a pushing mechanism The upper surface of the expression sticker is the surface with patterns. The bottom of the mounting groove has a through hole The pushing mechanism includes:

2. The changeable expression robot head of claim 1, wherein, The sliding pull rod is fixedly connected with the pushing arm The part of the sliding pull rod protruding from the face is the nose connecting part The pushing mechanism further includes a reset spring sleeved on the sliding pull rod The two ends of the reset spring abut against the inner wall surface of the head and the pushing arm respectively The nose connecting part abuts against the face 3. The changeable expression robot head of claim 2, wherein, The pushing arm forms an abutting point A with each expression sticker 4. The changeable expression robot head of claim 3, wherein, The pushing arm forms an abutting point B with each expression sticker The center of the magnetic field formed by the magnetic component is away from the center of the expression sticker and close to the abutting point B The nose connecting part is provided with a connecting hole perpendicular to the axis of the sliding pull rod 5. The changeable expression robot head of claim 4, wherein, The nose has a connecting pin inserted into the connecting hole 6. The changeable expression robot head of claim 4, wherein, The projection of the nose connecting part towards the front view plane is a rectangle The face is provided with a rectangular hole 7. The changeable expression robot head of claim 5 or 6, wherein, A2>A1>B2>B1 The surface of the face provided with the rectangular hole position is provided with a positioning groove 8. The changeable expression robot head of claim 7, wherein, The nose connecting part is rotated after passing through the rectangular hole, and the nose connecting part is coupled with the positioning groove The inner wall surface of the face is the wall surface of the face facing the inner cavity of the head ​ 9. The changeable expression robot head of claim 8, wherein, ​ ​ 10. The changeable expression robot head of claim 9, wherein, ​ ​ ​

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