(Cross-reference to related applications, the present application claims priority to China patent application Ser. No. 202323320357.1, entitled "bracket and electronic device Assembly", filed on Pub. No. 202323320357.1, 12, 05, 2023, the entire contents of which are incorporated herein by reference.)
Disclosure of utility model
The embodiment of the application provides a bracket and an electronic equipment accessory, so as to at least partially solve the problems.
The embodiment of the application is realized by the following technical scheme.
In a first aspect, embodiments of the present application provide a bracket including a mounting member, a support member, and a connection mechanism. One end of the supporting piece is rotatably connected with an external device through the mounting piece. A connection mechanism is connected to the external device or the mount, and the connection mechanism is capable of mating the support to lock the other end of the support to the external device or the mount, or to separate the other end of the support from the external device or the mount.
In some embodiments, the connection mechanism includes a first functional element and a second functional element that cooperate with each other to lock or disengage;
The first functional piece is arranged on the mounting piece, the second functional piece is embedded on the supporting piece, or the first functional piece is arranged on the external device, and the second functional piece is embedded on the supporting piece.
In some embodiments, the first functional element and the second functional element are mechanically mated.
In some embodiments, the second functional element is at least partially movably embedded in the supporting element and can move from a first position to a second position, when the second functional element is located at the first position, the first functional element is locked with the second functional element, and when the second functional element is located at the second position, the first functional element is unlocked or separated from the second functional element.
In some embodiments, the second functional element includes a latch element and a pressing element movably embedded in the supporting element, the first functional element includes an elastic fastener, the latch element is locked with the elastic fastener, and the pressing element can be pressed to move from the first position to the second position so as to open the elastic fastener, and the latch element is unlocked with the elastic fastener.
In some embodiments, the support member is provided with a movable groove, the pressing member is embedded in the movable groove and can move along the movable groove, the bottom of the pressing member is provided with a protrusion, the fastening member is fixedly arranged on the support member and located below the pressing member, the elastic fastening member is provided with a fastening buckle which is arranged oppositely, the fastening member is fastened with the fastening buckle, and when the pressing member moves from the first position to the second position, the protrusion pushes away the fastening buckle, so that the fastening member is separated from the fastening buckle.
In some embodiments, a guide is provided on a side of the clasp facing the clasp.
In some embodiments, the support member includes a relief portion where the connection mechanism is located when the other end of the support member is locked to the external device or the mounting member.
In some embodiments, a first fastening portion is provided on a side wall of the avoidance portion, and the connection mechanism includes a second fastening portion, and when the other end of the support member is locked on the external device or the mounting member, the first fastening portion is fastened with the second fastening portion.
In some embodiments, the connection mechanism further includes a pressing portion that cooperates with the second snap portion, and the second snap portion can be separated from the first snap portion by pressing the pressing portion.
In some embodiments, the pressing portion is provided with a first inclined surface, the second fastening portion is provided with a second inclined surface, and the first inclined surface cooperates with the second inclined surface, so that when the pressing portion is pressed, the pressing portion pushes the second fastening portion to be separated from the first fastening portion.
In some embodiments, the connecting mechanism further comprises a fixing part and a first reset piece, wherein one end of the first reset piece is connected with the pressing part, and the other end of the first reset piece is connected with the fixing part;
and/or, the connecting mechanism further comprises a fixing part and a second resetting piece, one end of the second resetting piece is connected with the second clamping buckle part, and the other end of the second resetting piece is connected with the fixing part.
In some embodiments, the support further comprises an elastic functional piece, the mounting piece comprises a rotating shaft, the elastic functional piece is sleeved on the rotating shaft, and when the connecting mechanism unlocks the supporting piece, the elastic functional piece can drive the supporting piece to rotate to a preset angle.
In some embodiments, the predetermined angle is 0-10 degrees.
In a second aspect, an embodiment of the present application further provides an electronic device accessory, including a main body and any one of the brackets described above, where one end of the support member is rotatably connected to the main body through the mounting member.
According to the support provided by the embodiment of the application, one end of the support piece is rotationally connected with an external device through the mounting piece, then the connecting mechanism is arranged between the support piece and the external device or the mounting piece, the connecting mechanism can be matched with the support piece to lock the other end of the support piece on the external device or the mounting piece, or the other end of the support piece is separated from the external device or the mounting piece, and a user can control the support piece to be separated from the mounting piece or the external device through the connecting mechanism, so that the support piece can be easily opened. The electronic equipment accessory applied to the above-described stand can also control the separation of the support member from the mount member or the external device by the connection mechanism.
The beneficial effects are that:
Through coupling mechanism unblock or locking support to make support separate from installed part or external device, after using above-mentioned structure, the user only needs simple pressing or sliding operation just can be relaxed unblock support and open support, has solved the inconvenient condition in the various use scenes that bring because of needs application of force in the current scheme.
Detailed Description
In order to make the present utility model better understood by those skilled in the art, the following description of the present utility model will be made in detail with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which a person skilled in the art would obtain without making any inventive effort, are within the scope of the utility model.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
Example 1
Referring to fig. 1 and 2, in an embodiment, there is provided a stand 2, the stand 2 including a mounting member 100, a support member 200, and a connection mechanism 400, one end of the support member 200 being rotatably connected to an external device 300 through the mounting member 100, the connection mechanism 400 being connected to the external device 300 or the support member 200, and the connection mechanism 400 being capable of cooperating with the support member 200 to lock the other end of the support member 200 to the external device 300 or the mounting member 100, or to separate the other end of the support member 200 from the external device 300 or the mounting member 100.
Specifically, the connection mechanism 400 can perform a locking or unlocking function, and more specifically, the connection mechanism 400 can be engaged with the support 200 to lock the other end of the support 200 to the external device 300 or the mount 100 or to separate the other end of the support 200 from the external device 300 or the mount 100.
In one aspect, the external device 300 may be a protective case or other elements capable of achieving a detachable relationship with the electronic apparatus, for example, the protective case is provided, the mounting member 100 is mounted on the protective case by means of magnetic attraction, clamping, gluing, bolting, etc., and the mounting member 100 may be a rotating shaft, so that the supporting member 200 is rotatably connected with the external device 300 through the mounting member 100, and the supporting member 200 is in a storage state or a supporting state relative to the external device 300.
On the other hand, the mounting member 100 may be a fixing member, and is mounted on the protective housing by means of magnetic attraction, clamping, gluing, etc., one end of the supporting member 200 is rotatably connected with the mounting member 100, so as to realize rotational connection between the supporting member 200 and the external device 300, and the other end of the supporting member 200 is locked or separated from the mounting member 100 by the connecting mechanism 400. The above arrangement can unlock or lock the support member 200 through the connection mechanism 400, so that the support member 200 is unlocked from the mounting member 100 or the external device 300, and the support member 200 can be rotated and opened relative to the mounting member 100 or the external device 300, thereby improving the opening efficiency of the support member 200, and avoiding the scratch caused by the user opening the support member 200 by fingers.
It can be understood that the mounting member 100 may also be directly mounted on one side of the electronic device by means of magnetic attraction, clamping, gluing, etc., and the mounting member 100 may be a base structure, where the supporting member 200 is rotatably connected to the base, and the unlocking or locking between the supporting member 200 and the base is achieved by the connection mechanism 400.
In one embodiment, the connection mechanism 400 can lock or unlock the support 200 by a resilient or electrical push rod. Specifically, the manner in which the connection mechanism 400 is locked or unlocked is not limited to a mechanism such as a lock catch that can achieve locking and separation.
Referring to fig. 3-6, in one embodiment, the connection mechanism 400 includes a first function member 410 and a second function member 420, the first function member 410 is disposed on the mounting member 100, the second function member 420 is disposed on the supporting member 200, or the first function member 410 is disposed on the external device 300, and the second function member 420 is disposed on the supporting member 200. Specifically, the first functional element 410 and the second functional element 420 are mechanisms that mechanically cooperate with each other to achieve locking or separation, such as a latch hook and a latch, a buckle 412 and a slot, and the like.
Referring to fig. 7-9, in one embodiment, the second functional element 420 is movably disposed on the supporting element 200 and can move from a first position to a second position, when the second functional element 420 is located at the first position, the first functional element 410 is locked with the second functional element 420, and when the second functional element 420 is located at the second position, the first functional element 410 is unlocked or separated from the second functional element 420.
Specifically, the first position and the second position may be set according to a desired locking or separating manner, for example, when the connection mechanism 400 is a locking hook and a locking buckle, or the locking buckle 412 and a clamping groove are set, the second functional element 420 is often moved in a pressing manner, that is, the first position and the second position are set in the thickness direction of the support member 200, so that the second functional element 420 is pressed to achieve locking or separating from the first functional element 410, and when the connection mechanism 400 is a magnet, the second functional element 420 is moved close to or far from another magnet, that is, the first position and the second position are set in the horizontal moving direction of the support member 200, so that the second functional element 420 is moved to achieve locking or separating from the first functional element 410.
Referring to fig. 6-8, in an embodiment, the second functional element 420 includes a latch 421 and a pressing element 422 movably disposed on the supporting element 200, the first functional element 410 includes an elastic latch 411, the latch 421 is locked with the elastic latch 411, and when the pressing element 422 moves from the first position to the second position, the pressing element 422 opens the elastic latch 411 to unlock the latch 421 and the elastic latch 411.
Specifically, after the locking element and the elastic locking element are locked, the pressing element 422 can move relative to the thickness direction of the supporting element 200 to move from the first position to the second position, so that a part of the structure of the pressing element 422 can push the clamping portion of the elastic locking element 411 open, and the locking element 421 is separated from the clamping connection of the elastic locking element 411, thereby achieving unlocking.
Referring to fig. 7-9, in an embodiment, the supporting member 200 is provided with a movable slot 210, the pressing member 422 can move along the movable slot 210, a protrusion 423 is disposed at the bottom of the pressing member 422, a fastening member 421 is disposed on the supporting member 200 and located below the pressing member 422, the elastic fastening member 411 has opposite fastening buckles 412, the fastening buckles 421 are fastened to the fastening buckles 412, and when the pressing member 422 moves from the first position to the second position, the protrusion 423 pushes the opposite fastening buckles 412 to disengage the fastening members 421 from the fastening buckles 412.
Specifically, the movable slot 210 is formed in the thickness direction of the support member 200, so that the pressing member 422 can move to the second position along the first position of the movable slot 210, the buckling member 421 is disposed at the position of the support member 200 near the bottom, the pressing member 422 is disposed above the buckling member 421 and can move to be near or far away from the buckling member 421 along the movable slot 210, when the pressing member 422 moves from the first position to the second position, the protrusion 423 is near the buckling member 421 and can push open the opposite buckling member 412, so that the buckling member 412 is in an open state, and the buckling member 421 is separated from the buckling member 412. In an embodiment, the side of the catch 421 facing the catch 412 is provided with a guiding portion 4211, and the guiding portion 4211 may help the boss to smoothly push the opposite catch 412 open, and it is understood that the guiding portion 4211 includes an inclined or arc chamfer.
Referring to fig. 3 and 4, in another embodiment, the bracket 2 further includes an elastic functional element, the elastic functional element includes a torsion spring 440, the torsion spring 440 is disposed at a rotation shaft of the support element 200 and the mounting element 100, and when the first functional element 410 unlocks the second functional element 420, i.e. the boss pushes the opposite buckle 412, the torsion spring 440 can drive the support element 200 to spring up relative to the mounting element 100 or the external device 300, so as to realize quick opening of the support element 200.
Referring to fig. 10-12, the present application also provides a structure of another embodiment of the stand 1.
In this embodiment, the stand 1 may also include a mounting member 100, a supporting member 200, and a connection mechanism 400, one end of the supporting member 200 is rotatably connected with the external device 300 through the mounting member 100, the connection mechanism 400 is connected with the external device 300 or the supporting member 200, and the connection mechanism 400 can be engaged with the supporting member 200 to lock the other end of the supporting member 200 to the external device 300 or the mounting member 100, or to separate the other end of the supporting member 200 from the external device 300 or the mounting member 100.
Specifically, in the present embodiment, the supporting member 200 may include the avoiding portion 220, and when the other end of the supporting member 200 is locked to the external device 300 or the mounting member 100, the connecting mechanism 400 is located at the avoiding portion 220, and it should be noted that, in the embodiment of the present application, the specific structure of the avoiding portion 220 is not limited, and may be, for example, a groove, a hole, a notch, or the like, and may be specifically set according to practical situations.
Further, the embodiment of the present application does not limit the way in which the support member 200 is engaged with the connection mechanism 400, for example, in one embodiment, the connection mechanism 400 may be embedded in the relief portion 220 of the support member 200 and connected with the relief portion 220 in an interference manner.
With continued reference to fig. 10-12, in another embodiment, the side wall of the avoidance portion 220 may be provided with a first fastening portion 221, and the connection mechanism 400 may include a second fastening portion 430, where the first fastening portion 221 may be fastened to the second fastening portion 430 when the other end of the support member 200 is locked to the external device 300 or the mounting member 100. It should be noted that, in the embodiment of the present application, the specific structures of the first fastening portion 221 and the second fastening portion 430 are not limited, for example, in one embodiment, the first fastening portion 221 may be a clamping groove, the second fastening portion 430 may be a clamping block, in another embodiment, the first fastening portion 221 may be a clamping block, and the second fastening portion 430 may be a clamping groove, which may be specifically configured according to the actual situation, and is not limited herein.
It should be noted that, in the embodiment of the present application, the specific position of the first fastening portion 221 is not limited, for example, in an embodiment, referring to fig. 12, 15 and 16, the avoiding portion 220 may be configured as a hole, the first fastening portion 221 may be configured as a slot, and the first fastening portion 221 may be disposed on an inner wall of the support 200 near one side of the outer edge.
For example, in another embodiment, referring to fig. 17, 18, 19 and 21, the avoiding portion 220 may be configured as a notch, specifically, the notch may be formed on an outer edge of the supporting frame 200, the first fastening portion 221 may be configured as a slot, and the first fastening portion 221 may be disposed on an inner wall of a side of the supporting member 200 near the inner edge.
Further, referring to fig. 13 and 14, in this embodiment, the connection mechanism 400 may further include a pressing portion 440, the pressing portion 440 may be matched with the second fastening portion 430, and by pressing the pressing portion 440, the second fastening portion 430 may be separated from the first fastening portion 221, which is specifically set according to practical situations.
Specifically, the pressing portion 440 may be provided with a first inclined plane 441, and the second fastening portion 430 may be provided with a second inclined plane 431, where the first inclined plane 441 may be matched with the second inclined plane 431, so that when the pressing portion 440 is pressed, the pressing portion 440 may push the second fastening portion 430 to be separated from the first fastening portion 221.
It should be noted that, in the embodiment of the present application, the inclination directions of the first inclined plane 441 and the second inclined plane 431 are not limited, for example, please refer to fig. 13, 14 and 16, in this embodiment, the first inclined plane 441 may be disposed toward the inner edge direction of the support member 200, and the second inclined plane 431 may be disposed toward the outer edge direction of the support member 200.
Referring to fig. 19 and 20, in the present embodiment, the first inclined surface 441 may be disposed toward the outer edge of the supporting member 200, and the second inclined surface 431 may be disposed toward the inner edge of the supporting member 200, specifically according to the actual situation.
It will be appreciated that in one embodiment, the first inclined surface 411 may be configured as a smooth inclined surface, which may make the user save more effort when pressing the pressing portion 440, and similarly, in other embodiments, the second inclined surface 431 may be configured as a smooth inclined surface, or both the first inclined surface 441 and the second inclined surface 431 may be configured as smooth inclined surfaces, which may be specifically configured according to practical situations, and is not limited herein.
Further, in one embodiment, the connection mechanism 400 may further include a fixing portion 450 and a first reset element 460. The second fastening portion 430 may be movably disposed on the fixing portion 450, for example, in one embodiment, a sliding rail may be disposed on a surface of the fixing portion 450, the second fastening portion 430 may be slidably disposed on the sliding rail of the fixing portion 450, and the second fastening portion 430 may selectively lock the support 200 or unlock the support 200 during sliding on the fixing portion 450.
Specifically, for convenience of explanation, the second fastening part 430 may include a third position and a fourth position on a path along which the surface of the fixing part 450 slides, the second fastening part 430 may slide from the third position to the fourth position, when the second fastening part 430 is located at the third position, the second fastening part 430 is locked with the first fastening part 221 of the supporting member 200, and when the second fastening part 430 is located at the fourth position, the second fastening part 430 is unlocked or separated from the first fastening part 221 of the supporting member 200.
The pressing portion 440 may include a fifth position and a sixth position in the process of being pressed, and the user may press the pressing portion 440 from the fifth position to the sixth position by pressing the pressing portion 440, in which the pressing portion 440 may drive the second catching portion 430 to slide from the third position to the fourth position.
One end of the first reset element 460 may be connected to the pressing portion 440, the other end may be connected to the fixing portion 450, the first reset element 460 may be used for recovering the position of the second fastening portion 430, specifically, when the user presses the pressing portion 440 and moves the pressing portion 440 from the fifth position to the sixth position, the pressing portion 440 drives the second fastening portion 430 to move from the third position to the fourth position, and the first reset element 460 may be used for driving the second fastening portion 430 from the fourth position to the third position and driving the pressing portion 440 to drive the pressing portion 440 from the sixth position to the fifth position after the user removes the external force.
In another embodiment, the connection mechanism 400 may also include a fixing portion 450 and a second reset element 470, one end of the second reset element 470 may be connected to the pressing portion 440, the other end may be connected to the fixing portion 450, the second reset element 470 may be used for restoring the position of the pressing portion 440, specifically, when the user presses the pressing portion 440 and moves the pressing portion 440 from the fifth position to the sixth position, the pressing portion 440 drives the second fastening portion 430 to move from the third position to the fourth position, and the second reset element 470 may be used for driving the pressing portion 440 from the sixth position to the fifth position after the user removes the external force.
It will be appreciated that in yet another embodiment, the connection mechanism 400 may further include a fixing member 450, a first reset member 460, and a second reset member 470, wherein one end of the first reset member 460 may be connected to the pressing portion 440, the other end may be connected to the fixing portion 450, the first reset member 460 may be used to restore the position of the second fastening portion 430, one end of the second reset member 470 may be connected to the pressing portion 440, the other end may be connected to the fixing portion 450, and the second reset member 470 may be used to restore the position of the pressing portion 440. In this embodiment, compared with the two embodiments described above, the first reset element 460 and the second reset element 470 are provided at the same time, so that the reset effect of the whole bracket 2 is more obvious, and the response speed of the whole bracket 2 during reset is increased.
The specific structure of the first reset element 460 and the second reset element 470 is not limited in the embodiment of the present application, for example, in one embodiment, the first reset element 460 and the second reset element 470 may be springs, in another embodiment, the first reset element 460 and the second reset element 470 may be elastic sheets, etc., and may be specifically set according to practical situations.
Further, please participate in fig. 11, fig. 12 and fig. 15 simultaneously, in an embodiment, the bracket 2 may further include an elastic function member 500, the mounting member may include a rotating shaft, the elastic function member sleeve 500 may be disposed on the rotating shaft, and the elastic function member 500 may be disposed between the support member 200 and the mounting member 100, when the connection mechanism 400 unlocks the support member 200, the elastic function member 500 may drive the support member 200 to rotate to a preset angle, and make the support member 200 bounce.
Specifically, when the support member 200 is locked to the mounting member 100 or the external device 300, the elastic function member 500 may be in a compressed state, and when the pressing portion 440 drives the second fastening portion 430 to disengage from the first fastening portion 221, the elastic function member 500 may be in a natural extended state, and at this time, the elastic function member 500 may drive the support member 200 to spring up relative to the connection mechanism 400, and a predetermined angle is formed between the support member 200 and the mounting member 100 or the external device 300, so that a user may conveniently rotate the support member 200 subsequently to change the support position of the support member 200.
It is understood that the above-mentioned preset angle may be set to be between 0 and 10 degrees, and it should be noted that 0 to 10 ° herein may be understood as being greater than 0 ° and less than or equal to 10 °. For example, the angle may be 3 °, 7 °,10 °, or the like, and if the angle is too large, the support 200 may be sprung too much, which may be a safety hazard for injuring the user when the support 200 is sprung.
It should be noted that, in the embodiment of the present application, the specific structure of the elastic functional element 500 is not limited, for example, in an embodiment, the elastic functional element 500 may be a torsion spring, a return spring, or the like, and may be specifically set according to practical situations.
In the bracket 2 provided by the embodiment of the application, one end of the supporting member 200 is rotatably connected with the external device 300 through the mounting member 100, then the connecting mechanism 400 is arranged between the supporting member 200 and the external device 300 or the mounting member 100, the connecting mechanism 400 can be matched with the supporting member 200 to lock the other end of the supporting member 200 on the external device 300 or the mounting member 100, or the other end of the supporting member 200 is separated from the external device 300 or the mounting member 100, and a user can control the supporting member 200 to be separated from the mounting member 100 or the external device 300 through the connecting mechanism 400, so that the supporting member 200 can be easily opened. After the structure is used, a user can easily unlock the support member 200 and open the support member 200 by only simple pressing or sliding operation, so that the inconvenience in various use scenes caused by force application in the prior art is solved.
Example two
Referring to fig. 1, in an embodiment, there is provided an electronic equipment accessory 1 including a main body and a bracket 2, one end of a support 200 is rotatably connected to the main body through a mount 100. It is understood that the main body may be the external device 300 of the first embodiment and is used for mounting an electronic apparatus, in another embodiment, the main body has a back plate 310, the mounting member 100 is disposed on the back plate 310, the connection mechanism 400 is disposed between the back plate 310 and the supporting member 200, one end of the supporting member 200 is rotatably connected to the mounting member 100, and the other end of the supporting member 200 is locked or separated from the back plate 310 by the connection mechanism 400.
Specifically, the main body may be a protective shell, the protective shell has a back plate 310, the mounting member 100 is mounted on the back plate 310, one end of the supporting member 200 is rotatably connected to the mounting member 100, and the supporting member is located at one side of the back plate 310 away from the electronic device, the first functional member 410 of the connecting mechanism 400 is disposed on the main body, and the second functional member 420 is disposed at the other end of the supporting member 200, so as to realize that the supporting member 200 is in a storage state or a supporting state relative to the protective shell.
In one embodiment, the main body is provided with a mounting groove 320, the bracket 2 is mounted in the mounting groove 320, or the main body is provided with a receiving groove, the supporting member 200 can be received in the receiving groove, or the mounting member 100 and the main body are integrally formed. Taking the main body with the mounting groove 320 as an example, the mounting groove 320 may be formed in the back plate 310 of the main body, the magnet 240 is disposed in the support member 200, the support member 200 magnetically connects the mounting member 100 with the electronic device through the magnet 240, and when the protective housing is used for mounting the electronic device, the magnet 240 in the support member 200 is also used for enhancing stability of the protective housing and the electronic device, and can also be used for adsorbing another main body, such as a wireless charging device.
The electronic equipment accessory 1 applied to the above-described stand 2 can also control the separation of the support 200 from the mount 100 or the external device 300 by the connection mechanism 400, thereby easily opening the support 200. After the structure is used, a user can easily unlock the support member 200 and open the support member 200 by only simple pressing or sliding operation, so that the inconvenience in various use scenes caused by force application in the prior art is solved.
In the present utility model, the terms "mounted," "connected," and the like should be construed broadly unless otherwise specifically indicated or defined. For example, the device can be fixedly connected, detachably connected, integrally connected or in transmission, and can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for understanding as a specific or particular structure. The description of the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In the present utility model, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples of the present utility model and features of various embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing embodiments are merely for illustrating the technical aspects of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical aspects described in the foregoing embodiments may be modified or substituted for some of the technical features thereof, and that the modification or substitution does not depart from the spirit and scope of the technical aspects of the embodiments of the present utility model.