Shell clamping structure and anti-lost device
By incorporating multiple latches and locking mechanisms on the battery compartment door, and using a lever tool to release the latches, the problem of accidental opening of the battery compartment door is solved, achieving higher reliability and safety.
Patent Information
- Application Number
- CN202422511628.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-16
AI Technical Summary
In existing technologies, the screws on the battery compartment door are prone to accidentally falling off or being lost, posing a risk that children may accidentally open the battery compartment, affecting the reliability and safety of use.
The battery compartment door is opened by using multiple latches and locking structures on the upper and lower shells. A rod tool is needed to insert a spring through a through hole to release the latch, thus achieving two independent and synchronous actions to open the battery compartment door.
The reliability and safety of the battery compartment door have been improved, preventing children from accidentally opening it and enhancing safety during use.
Smart Images

Figure CN223462344U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic product technical field, especially a shell clamping structure and anti -loss device. BACKGROUND
[0002] The mandatory national standard GB4943.1-2022 has relevant provisions on the structural form of audio and video, information technology and communication technology equipment, and one or more devices with button batteries need to ensure that the battery compartment door or cover of such devices reduces the possibility of children moving button batteries using the following methods. One is to use a tool, such as a screwdriver or a coin, to open the battery compartment, in which case a torque of at least 0.5 N·m and a rotation of at least 90° are required to open the battery compartment. One is at least two independent and simultaneous actions are required to open manually.
[0003] In the prior art, the form of setting screws on the battery compartment door is usually used to avoid accidental opening by children, however, in the actual use process, the screws on the battery compartment door are prone to accidental falling and loss, which is not conducive to ensuring the reliability and safety during use. SUMMARY
[0004] The utility model provides a shell clamping structure and anti -loss device can adopt two independent and synchronous actions to open to improve the reliability and safety during use.
[0005] The utility model discloses a shell clamping structure, include: upper shell and lower shell, be provided with a plurality of first buckle on the upper shell, be provided with a plurality of respectively with first buckle corresponding second buckle on the lower shell, still be provided with the spring piece on the upper shell, be provided with the limiting hole on the spring piece, be provided with the card convex with spring piece corresponding on the lower shell, when the upper shell with lower shell buckle, first buckle can with second buckle clamping, and card convex with the clamping of limiting hole, still be provided with the via on the lower shell body, so that the rod body can insert via with spring piece and resist, remove the clamping of card convex with limiting hole, and when the reverse force is applied to the upper shell and lower shell, first buckle can separate second buckle.
[0006] Optionally, the first buckle includes an extension arm connected to the upper shell, and a folded edge provided at the end of the extension arm, the two sides of the thickness direction of the folded edge are respectively provided with a first guide slope and a second guide slope, wherein the first guide slope is located on the side of the folded edge facing the extension arm, the second buckle includes a clamping groove provided on the lower shell, one side wall of the clamping groove is provided with a third guide slope, and the first guide slope corresponds to the third guide slope when the first buckle and the second buckle are clamped.
[0007] Optionally, the lower shell is further provided with a connecting portion, a through hole is formed between the connecting portion and the lower shell, the through hole corresponds to the connecting portion, and an extension direction of the through hole forms a preset included angle with a plane on which the lower shell is located.
[0008] Optionally, the lower shell is further provided with an avoiding groove, the avoiding groove corresponds to the through hole, and a hand buckle space is formed at the avoiding groove when the upper shell is buckled with the lower shell.
[0009] Optionally, the elastic sheet comprises a connecting section and a clamping section which are connected with each other, the connecting section is connected with the upper shell through a pressing block, and the limiting hole is located on the clamping section.
[0010] The utility model discloses still disclose a kind of anti-lost devices, including buzzer component, and the shell clamping structure described in any one of the above, the buzzer component is between the upper shell and the lower shell of the shell clamping structure.
[0011] Optionally, the buzzer component comprises a circuit board connected with the lower shell, and a buzzer body and a battery mounting assembly connected with the circuit board respectively, the buzzer body and the battery mounting assembly are located on opposite sides of the circuit board respectively, and the battery mounting assembly is located on the side towards the upper shell.
[0012] Optionally, the battery mounting assembly comprises a positive electrode conductive sheet and a negative electrode conductive sheet connected with the circuit board respectively, a battery compartment for mounting a battery is formed between the positive electrode conductive sheet and the negative electrode conductive sheet.
[0013] Optionally, the upper shell is further provided with a key, and the circuit board is provided with a switch corresponding to the key, so that the switch is triggered when the key is pressed.
[0014] Optionally, the key comprises a first connecting arm, a pressing portion and a second connecting arm connected in sequence, the first connecting arm and the second connecting arm are connected with the inner wall of the upper shell respectively, the upper shell is further provided with an avoiding hole, the pressing portion corresponds to the avoiding hole, the pressing portion is provided with a protrusion, and the protrusion is used for abutting against the switch.
[0015] Compared with the prior art, the casing clamping structure and the anti-lost device have the beneficial effects that: the plurality of first buckles arranged on the upper casing cooperate with the plurality of second buckles arranged on the lower casing, and the required action for opening one of the upper casing and the lower casing is realized. Meanwhile, the elastic sheet is arranged on the upper casing, the clamping protrusion corresponding to the elastic sheet is arranged on the lower casing, when the upper casing and the lower casing need to be separated, the rod body or the like tool is used to insert into the lower casing through the through hole on the lower casing, and the elastic sheet is abutted, so that the elastic sheet is elastically deformed, the clamping of the clamping protrusion and the limiting hole is released, and the separation of the upper casing and the lower casing is ensured. The clamping protrusion and the limiting hole are released by the rod body or the like tool, which is another required action for opening the upper casing and the lower casing. Only after the clamping of the clamping protrusion and the limiting hole is released, the upper casing and the lower casing can be buckled, the first buckle is separated from the second buckle, and finally the separation of the upper casing and the lower casing is realized. In the above manner, two independent and synchronous actions are used for opening, the accidental opening of children is avoided, and the reliability and safety during use are improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] The technical solutions of the utility model will be further explained in detail below in combination with the drawings and embodiments, and the drawings are as follows:
[0017] Figure 1 is the structure schematic view of the anti-lost device provided by the utility model embodiment;
[0018] Figure 2 is the section schematic view of the anti-lost device provided by the utility model embodiment;
[0019] Figure 3 is the structure schematic view of the upper casing provided by the utility model embodiment;
[0020] Figure 4 is the structure schematic view of the lower casing and the buzzer assembly cooperation provided by the utility model embodiment;
[0021] Figure 5 is the structure schematic view two of the anti-lost device provided by the utility model embodiment;
[0022] Figure 6 is Figure 2 the local enlarged view of A in Fig. 1;
[0023] Figure 7 is Figure 2 the local enlarged view of B in Fig. 1;
[0024] Figure 8 is the explosion schematic view of the anti-lost device provided by the utility model embodiment;
[0025] Figure 9 is Figure 8 the local enlarged view of C in Fig. 1;
[0026] Figure 10 is Figure 8 is a local enlarged view of D in FIG.
[0027] The reference signs in the drawings refer to:
[0028] 10, upper shell; 11, first buckle; 112, extension arm; 114, folded edge; 1142, first guide slope; 1144, second guide slope; 12, elastic sheet; 121, limiting hole; 122, connecting section; 124, buckling section; 13, pressing block; 14, button; 142, first connecting arm; 144, pressing part; 146, second connecting arm; 148, protrusion; 15, avoiding hole; 20, lower shell; 21, second buckle; 212, third guide slope; 22, buckling protrusion; 23, via hole; 24, rod body; 25, connecting part; 252, through hole; 26, avoiding groove; 30, buzzer assembly; 31, circuit board; 312, switch; 32, buzzer body; 33, battery mounting assembly; 332, positive conductive sheet; 334, negative conductive sheet; 34, button cell; 35, first conductive foam; 36, second conductive foam; 37, insulating film. DETAILED DESCRIPTION
[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the present application will be described in detail with reference to the drawings.
[0030] As Figures 1 to 5 shown, the shell clamping structure comprises an upper shell 10 and a lower shell 20, the upper shell 10 is provided with a plurality of first buckles 11, the lower shell 20 is provided with a plurality of second buckles 21 corresponding to the first buckles 11 respectively, the upper shell 10 is further provided with an elastic sheet 12, the elastic sheet 12 is provided with a limiting hole 121, the lower shell 20 is provided with a buckling protrusion 22 corresponding to the elastic sheet 12, when the upper shell 10 and the lower shell 20 are buckled, the first buckles 11 can be buckled with the second buckles 21, and the buckling protrusion 22 is buckled with the limiting hole 121, the lower shell 20 is further provided with a via hole 23, so that the rod body 24 can be inserted into the via hole 23 and abut against the elastic sheet 12, the buckling of the buckling protrusion 22 and the limiting hole 121 is released, and when a reverse force is applied to the upper shell 10 and the lower shell 20, the first buckles 11 can be separated from the second buckles 21.
[0031] Specifically, for the electronic device with detachable battery, the cooperation between the upper shell 10 and the lower shell 20 is basically the same as the form of detaching the battery compartment door from the shell. The application is described by taking the cooperation between the upper shell 10 and the lower shell 20 as an example. A plurality of first buckles 11 are arranged on the upper shell 10, and a plurality of second buckles 21 corresponding to the first buckles 11 are arranged on the lower shell 20. When the upper shell 10 and the lower shell 20 are buckled, the first buckles 11 and the second buckles 21 are buckled one by one to avoid accidental separation of the upper shell 10 and the lower shell 20. At the same time, the spring plate 12 corresponds to the clamping convex 22 on the lower shell 20, so that the clamping convex 22 and the limiting hole 121 on the spring plate 12 are clamped. It can be understood that the limiting hole 121 can be provided as one or two, and the clamping convex 22 and the limiting hole 121 are clamped one by one to ensure the stability of the buckling connection between the upper shell 10 and the lower shell 20.
[0032] As shown in Figure 7 When it is necessary to separate the upper shell 10 and the lower shell 20, the rod body 24 needs to be inserted into the through hole 23 of the lower shell 20, so that the rod body 24 and the spring plate 12 are in abutment, and the spring plate 12 is deformed under force, so that the clamping convex 22 and the spring plate 12 are in a clamping relationship. At this time, the upper shell 10 can be buckled to apply a reverse force to the upper shell 10 and the lower shell 20, so that the first buckle 11 is separated from the second buckle 21, so as to facilitate the replacement of the battery located between the upper shell 10 and the lower shell 20.
[0033] It should be noted that the rod body 24 can be a card needle corresponding to the electronic product, or a toothpick or a household common object such as a paper clip, which can be used as a tool to unlock the spring plate 12. In addition, in order to facilitate the buckling connection between the upper shell 10 and the lower shell 20, a guide surface can be arranged on the side of the clamping convex 22 facing the spring plate 12, so that when the upper shell 10 is pressed, the spring plate 12 can be deformed, so that the clamping convex 22 and the limiting hole 121 are clamped, and the convenience of buckling the upper shell 10 and the lower shell 20 is improved.
[0034] The shell clamping structure provided by the embodiments of the present application is matched with the plurality of first buckles 11 arranged on the upper shell 10 and the plurality of second buckles 21 arranged on the lower shell 20, so as to realize the action required for opening one of the upper shell 10 and the lower shell 20. Meanwhile, the spring piece 12 is arranged on the upper shell 10, and the clamping convex 22 corresponding to the spring piece 12 is arranged on the lower shell 20. When the upper shell 10 and the lower shell 20 need to be separated, the rod body 24 and the like are used to insert the through hole 23 on the lower shell 20 into the lower shell 20, and abut against the spring piece 12, so that the spring piece 12 is elastically deformed, the clamping convex 22 and the limiting hole 121 are disengaged, and the upper shell 10 and the lower shell 20 can be separated. The clamping convex 22 and the limiting hole 121 are disengaged by the rod body 24 and the like, which is another action required for opening the upper shell 10 and the lower shell 20. Only after the clamping convex 22 and the limiting hole 121 are disengaged, the upper shell 10 and the lower shell 20 can be buckled, the first buckle 11 is disengaged from the second buckle 21, and finally the upper shell 10 and the lower shell 20 are separated. By using the above-mentioned mode, two independent and synchronous actions can be used for opening, the child is prevented from opening accidentally, and the reliability and safety during use are improved.
[0035] As shown in Figure 6 , Figure 8 and Figure 9 , the first buckle 11 includes the extension arm 112 connected with the upper shell 10, and the folded edge 114 arranged at the end of the extension arm 112, and the first guide inclined surface 1142 and the second guide inclined surface 1144 are arranged on both sides of the thickness direction of the folded edge 114, respectively, wherein the first guide inclined surface 1142 is located on the side of the folded edge 114 facing the extension arm 112, and the second buckle 21 includes the clamping groove arranged on the lower shell 20, and the third guide inclined surface 212 is arranged on one side wall of the clamping groove, and the first guide inclined surface 1142 corresponds to the third guide inclined surface 212 when the first buckle 11 is clamped with the second buckle 21.
[0036] Specifically, the folded edge 114 at the end of the extension arm 112 extends outward to facilitate cooperation with the second buckle 21. By arranging the first guide slope 1142 and the second guide slope 1144 on both sides of the folded edge 114 in the thickness direction, the second guide slope 1144 can cooperate with the second buckle 21 when the upper shell 10 is connected with the lower shell 20, facilitating the buckling cooperation between the first buckle 11 and the second buckle 21. During the separation of the upper shell 10 and the lower shell 20, the first guide slope 1142 can cooperate with the second buckle 21, facilitating the separation of the first buckle 11 and the second buckle 21. In addition, in order to reduce the difficulty of separating the first buckle 11 and the second buckle 21, the second buckle 21 is provided with a third guide slope 212 on one side wall of the clamping groove, and the first guide slope 1142 corresponds to the third guide slope 212, so as to facilitate the separation of the upper shell 10 and the lower shell 20. When the clamping protrusion 22 is clamped in the limiting hole 121, the first buckle 11 and the second buckle 21 can be prevented from being separated, which is beneficial to improve the reliability during use and reduce the difficulty of separating the upper shell 10 and the lower shell 20.
[0037] It should be noted that the clamping groove of the second buckle 21 can be directly relied on the lower shell 20 and formed on the inner wall of the lower shell 20, or a stand can be arranged on the lower shell 20 and the clamping groove is formed on the stand, as long as the cooperation and connection between the first buckle 11 and the second buckle 21 can be achieved.
[0038] As shown in Figure 5 and Figure 10 , the lower shell 20 is further provided with a connecting portion 25, and a through hole 252 is formed between the connecting portion 25 and the lower shell 20. The through hole 23 corresponds to the connecting portion 25, and the extension direction of the through hole 23 forms a preset angle with the plane on which the lower shell 20 is located.
[0039] Specifically, by arranging the connecting portion 25 on the lower shell 20 and forming the through hole 252 between the connecting portion 25 and the lower shell 20, a connecting member such as a band or a connecting ring can be connected with other articles through the through hole 252. In this way, the lower shell 20 and other articles can be stably connected together, and when applied to a loss-preventing device, it can also help to find the corresponding article. In addition, by corresponding the through hole 23 with the connecting portion 25, the through hole 23 can be shielded and protected. When it is necessary to insert the rod body 24 into the through hole 23, in order to avoid the shielding of the connecting portion 25, the extension direction of the through hole 23 forms a preset angle with the plane on which the lower shell 20 is located. In this way, the rod body 24 can be inserted obliquely and resisted by the elastic sheet 12, avoiding the shielding of the connecting portion 25.
[0040] As shown in Figure 10 , the lower shell 20 is further provided with an avoiding groove 26, the avoiding groove 26 corresponds to the through hole 23, and a hand buckle space is formed in the avoiding groove 26 when the upper shell 10 is buckled with the lower shell 20.
[0041] In this way, when the rod body 24 is inserted into the through hole 23 to release the clamping of the elastic sheet 12 and the clamping protrusion 22, the hand holding space position also needs to be held by hand, the rod body 24 insertion area is adjacent to the hand holding area by corresponding the avoidance groove 26 with the through hole 23, which facilitates the separation of the upper shell 10 and the lower shell 20, and is conducive to reducing the operation difficulty.
[0042] As shown in Figure 8 , the elastic sheet 12 comprises a connecting section 122 and a clamping section 124 connected with each other, the connecting section 122 is connected with the upper shell 10 through the pressing block 13, and the limiting hole 121 is located on the clamping section 124.
[0043] Specifically, by setting the elastic sheet 12 as the connecting section 122 and the clamping section 124 connected with each other, the connection of the elastic sheet 12 and the upper shell 10 is facilitated, and the cooperation of the elastic sheet 12 and the clamping protrusion 22 is facilitated. Among them, the connecting section 122 and the clamping section 124 can be arranged at an angle of 90°, and when the limiting hole 121 is located on the clamping section 124, the cooperation of the elastic sheet 12 and the clamping protrusion 22 is more smooth.
[0044] As shown in Figure 4 and Figure 8 , the utility model discloses a kind of anti-lost devices, including buzzer component 30, and the shell clamping structure of any one of the above, buzzer component 30 is located between the upper shell 10 and the lower shell 20 of shell clamping structure.For other common and necessary components that anti-lost device has, the present application embodiment will not be additionally described.The anti-lost device includes the same structure and beneficial effect as the shell clamping structure in the foregoing embodiment.The structure and beneficial effect of shell clamping structure have been described in detail in the foregoing embodiment, and will not be described here.
[0045] As shown in Figure 4 and Figure 8 , buzzer component 30 includes circuit board 31 connected with lower shell 20, and buzzer body 32 and battery installation component 33 respectively connected with circuit board 31, buzzer body 32 and battery installation component 33 are respectively located on opposite sides of circuit board 31, and battery installation component 33 is located on the side towards upper shell 10.
[0046] Specifically, by locating buzzer body 32 and battery installation component 33 respectively on opposite sides of circuit board 31, and battery installation component 33 is located on the side towards upper shell 10, when upper shell 10 is separated from lower shell 20, lower shell 20 can play a protective role for buzzer body 32.And expose battery installation component 33 to facilitate battery replacement. Among them, the battery can be dry battery, and can be set as Figure 8The shown button cell 34. In actual application, the buzzer body 32 is connected with the circuit board 31, and the required electrical connection relationship can be realized through the first conductive foam 35 and the second conductive foam 36.
[0047] As shown in the figure, the battery mounting assembly 33 includes a positive conductive sheet 332 and a negative conductive sheet 334 connected with the circuit board 31 respectively, and a battery compartment for mounting the battery is formed between the positive conductive sheet 332 and the negative conductive sheet 334. Figure 8 Specifically, after the positive conductive sheet 332 and the negative conductive sheet 334 are connected with the circuit board 31 respectively, a battery compartment for mounting the battery is formed between the positive conductive sheet 332 and the negative conductive sheet 334, so that after the battery is mounted, the battery can be electrically connected with the positive conductive sheet 332 and the negative conductive sheet 334 to form the required circuit conduction. In addition, the internal preset button cell 34 is provided when the anti-lost device is factory-finished, in order to avoid the discharge of the button cell 34, an insulating film 37 can be arranged at the positive or negative electrode of the button cell 34, and one end of the insulating film 37 is exposed, and in use, the insulating film 37 is pulled out to realize the required electrical connection.
[0048] As shown in the figure, the battery mounting assembly 33 includes a positive conductive sheet 332 and a negative conductive sheet 334 connected with the circuit board 31 respectively, and a battery compartment for mounting the battery is formed between the positive conductive sheet 332 and the negative conductive sheet 334.
[0049] Figure 1 As shown in the figure, the battery mounting assembly 33 includes a positive conductive sheet 332 and a negative conductive sheet 334 connected with the circuit board 31 respectively, and a battery compartment for mounting the battery is formed between the positive conductive sheet 332 and the negative conductive sheet 334. Figure 8 As shown in the figure, the battery mounting assembly 33 includes a positive conductive sheet 332 and a negative conductive sheet 334 connected with the circuit board 31 respectively, and a battery compartment for mounting the battery is formed between the positive conductive sheet 332 and the negative conductive sheet 334.
[0050] Specifically, in use of the anti-lost device, the switch 312 can be controlled to act through the key 14, to realize the power-on or power-off of the anti-lost device. Long-pressing or other operations can also be used to realize pairing and other operations, to facilitate the control and use of the anti-lost device.
[0051] Figure 3 As shown in the figure, the battery mounting assembly 33 includes a positive conductive sheet 332 and a negative conductive sheet 334 connected with the circuit board 31 respectively, and a battery compartment for mounting the battery is formed between the positive conductive sheet 332 and the negative conductive sheet 334.
[0052] Specifically, the first connecting arm 142 and the second connecting arm 146 are connected with the inner wall of the upper shell 10 respectively, so as to ensure the stability of the connection between the key 14 and the upper shell 10. Meanwhile, the first connecting arm 142 and the second connecting arm 146 can elastically support the pressing part 144. The upper shell 10 is further provided with an avoiding hole 15, and the pressing part 144 corresponds to the avoiding hole 15, so that part of the pressing part 144 is exposed, facilitating the pressing of the pressing part 144. In addition, the pressing part 144 is provided with a protrusion 148, so as to cooperate with the switch 312, avoid the movement stroke of the pressing part 144 being too large to cause damage to the key 14, and be beneficial to the improvement of the service life.
[0053] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents. All these modifications and replacements shall belong to the protection scope of the claims of the present application.
Claims
1. A housing engaging structure, characterized in that: The application relates to a shell clamping structure, which comprises an upper shell and a lower shell, a plurality of first buckles arranged on the upper shell, a plurality of second buckles corresponding to the first buckles respectively arranged on the lower shell, a spring sheet arranged on the upper shell, a limiting hole arranged on the spring sheet, a clamping convex corresponding to the spring sheet arranged on the lower shell, and a through hole arranged on the lower shell body to enable a rod body to be inserted into the through hole and abut against the spring sheet. The first buckle comprises an extension arm connected with the upper shell and a folded edge arranged at the end of the extension arm, and first and second guide inclined surfaces are arranged on the two sides of the thickness direction of the folded edge, wherein the first guide inclined surface is located on the side of the folded edge facing the extension arm, and the second buckle comprises a clamping groove arranged on the lower shell, and a third guide inclined surface is arranged on one side wall of the clamping groove.
2. The case engagement structure according to claim 1, characterized by The lower shell is further provided with a connecting portion, a through hole is formed between the connecting portion and the lower shell, the through hole corresponds to the connecting portion, and the extension direction of the through hole forms a preset included angle with the plane where the lower shell is located.
3. The case engaging structure according to claim 2, characterized by The lower shell is further provided with an avoiding groove corresponding to the through hole, and a hand clamping space is formed at the avoiding groove when the upper shell is clamped with the lower shell.
4. The case engaging structure according to claim 3, characterized by The spring sheet comprises a connecting section and a clamping section connected with each other, the connecting section is connected with the upper shell through a pressing block, and the limiting hole is arranged on the clamping section.
5. The case engagement structure according to any one of claims 1 to 4, characterized in that, The application further relates to a buzzer assembly and the shell clamping structure.
6. A loss-prevention device, characterized by The buzzer assembly comprises a circuit board connected with the lower shell, a buzzer body and a battery mounting assembly connected with the circuit board respectively, the buzzer body and the battery mounting assembly are arranged on the opposite sides of the circuit board respectively, and the battery mounting assembly is arranged on the side facing the upper shell.
7. The anti-loss device of claim 6, wherein, The battery mounting assembly comprises a positive electrode conductive sheet and a negative electrode conductive sheet connected with the circuit board respectively, and a battery compartment for mounting a battery is formed between the positive electrode conductive sheet and the negative electrode conductive sheet.
8. The anti-loss device of claim 7, wherein, The upper shell is further provided with a key, and a switch corresponding to the key is arranged on the circuit board to trigger the switch to act when the key is pressed.
9. The anti-loss device of claim 8, wherein, The key comprises a first connecting arm, a pressing part and a second connecting arm connected in sequence, the first connecting arm and the second connecting arm are connected with the inner wall of the upper shell respectively, the upper shell is further provided with an avoiding hole corresponding to the pressing part, the pressing part is provided with a protrusion for abutting against the switch.
10. The anti-loss device of claim 9, wherein,