KR101317305B1 - Image forming apparatus - Google Patents

Abstract

Disclosed is an image forming apparatus which can reliably interrupt the power transmitted to a developing device with a simple configuration. In the image forming apparatus of the present invention, the power transmission means for selectively transmitting the power of the driving source to the plurality of developing devices includes a plurality of rotating shafts and a plurality of intermittent powers interposed between the rotating shafts and the plurality of developing devices to be transferred to the developing devices. And a plurality of interference control parts provided on the rotation shaft so as to correspond to each of the first spring clutch and the plurality of first spring clutches, and determining whether to interfere with the first spring clutch according to the rotational phase of the rotation shaft. Each of the plurality of interference control units includes an interference canceling unit formed in a partial region along a rotational direction of the rotary shaft, and an interference unit formed in a region other than the interference canceling unit.

Description

[0001] IMAGE FORMING APPARATUS [0002]

      1 is a sectional view showing a configuration of an image forming apparatus according to the present invention;

      Figure 2 is a view showing the configuration of the power transmission means in the image forming apparatus according to the present invention.

      3 is a perspective view showing an extract of some of the configuration in FIG.

     Figure 4 is an exploded perspective view showing the configuration of the first spring clutch in the image forming apparatus according to the present invention.

     5 is a view for explaining the operation of the power transmission means in the image forming apparatus according to the present invention.

      Description of the Related Art [0002]

      30: developing unit 33: developing unit

      100: power transmission means 110: rotary shaft

      120: first spring clutch 126: locking projection

      130: interference control unit 131: interference release unit

      132: interference portion 132a: interference member

      150: second clutch spring 160: restraining unit

      BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus having an improved configuration of a power transmitting means for transmitting power of a driving source to a plurality of developing devices.

      An image forming apparatus refers to a device that prints an image on paper, which is a print medium, in accordance with an input image signal. An electrophotographic color image forming apparatus, which is a type of image forming apparatus, scans light on a photosensitive member charged to a predetermined potential to form an electrostatic latent image on its outer circumferential surface, and injects a toner of a predetermined color into the electrostatic latent image to develop a visible image. Then, it is transferred and fixed on paper to print an image. Since the color image forming apparatus usually uses toners of four colors of yellow, magenta, cyan and black, the color image forming apparatus has four developing units corresponding to each color. Is installed.

      On the other hand, there are a single pass method using four exposure units and a photosensitive member, and a multipath method using one exposure unit and a photosensitive member. Among them, the multi-pass method repeats exposure, development and transfer for each color to form an image on the intermediate transfer medium, and transfers it to paper to form an image on the paper. In the multipath image forming apparatus, four developing apparatuses are sequentially operated, and thus, an apparatus for sequentially transmitting power of the driving motor to the four developing apparatuses is required. Therefore, conventionally, four electromagnetic clutches are employed to control the power transmitted to each developing unit.

      However, since the electronic clutch is expensive and its size must be increased as the developer driving load increases, the electronic clutch has a limitation that cannot be applied to a small image forming apparatus. In consideration of this problem, Korean Patent No. 628567 discloses a rotating shaft, a plurality of cams provided on the rotating shaft so as to correspond to each of the plurality of developing devices, and a rotational force according to the rotational phase of the rotating shaft instead of using an electronic clutch. An image forming apparatus for controlling power by using a power transmission means for selectively transmitting to a plurality of developing devices is disclosed.

      However, the disclosed conventional image forming apparatus needs to accurately determine the rotational phase of the rotating shaft in order to operate a plurality of developing devices in sequence, which complicates the configuration for controlling the phase, and needs to check whether the rotating shaft has the correct phase. There is inconvenience,

      SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an image forming apparatus which can reliably control the power transmitted to a developing device with a simple configuration.

An image forming apparatus according to the present invention for achieving the above object comprises an power transmitting means for selectively transmitting the power of a drive source to a plurality of developing devices, the power transmission means is a rotary shaft; and the rotary shaft And a plurality of first spring clutches interposed between the plurality of developing devices and intermittent the power transmitted to the plurality of developing devices, and provided on the rotary shaft so as to correspond to the plurality of first spring clutches, respectively. And a plurality of interference controllers determining whether to interfere with the first spring clutch according to the rotational phase.

Each of the plurality of interference control units includes an interference canceling unit formed in a partial region along a rotation direction of the rotary shaft, and an interference unit formed in a region other than the interference canceling unit.

At least two of the interference canceling units have different phases along the rotational direction of the rotary shaft.

Each of the interference parts may include a plurality of interference members spaced apart along the rotation direction of the rotary shaft.

The interference member is preferably formed to be elastically deformed along the rotational direction of the rotary shaft.

The first spring clutch may include a first hub that rotates by receiving power from the driving source; and a second hub that is intermittently connected to the first hub by a clutch spring; and the clutch between the first hub and the second hub. It is disposed so as to surround the spring, the clutch hub formed with a locking projection interacting with the interference control portion at one end; wherein the outer peripheral surface of the clutch hub is formed to be inclined so that the diameter of the clutch hub is smaller toward the end formed with the locking projection Can be.

The rotary shaft is rotated by the drive source, the power transmission means further comprises a second spring clutch interposed between the drive source and the rotary shaft, and the restraining unit for restraining the power transmission by restraining the second spring clutch. It can be configured.

Each of the plurality of interference control units may be configured to interfere with a corresponding first spring clutch when the restraining unit restrains the second spring clutch.

Meanwhile, the interference control unit rotates on a plane perpendicular to the plane in which the locking protrusion rotates and interacts with the locking protrusion.

      Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a cross-sectional view showing the configuration of an image forming apparatus according to the present invention.

      As shown in FIG. 1, the image forming apparatus according to the present invention forms an appearance, a paper feeding unit for supplying a main body 10 for supporting various components installed therein, and a paper S, which is a printing medium. 20, the developing unit 30 for developing an image on the paper, the fixing unit 40 for fixing the image to the paper by applying heat and pressure to the paper, and the printed paper to the outside of the main body 10. It is provided with a discharge unit 50 for.

      The paper feeding unit 20 develops a paper feed tray 21 on which paper S is loaded, a pickup roller 22 for picking up the paper S loaded on the paper tray 21 one by one, and the picked paper. It comprises a feed roller 23 for moving toward the unit (30).

     The developing unit 30 includes a photosensitive member 31 having an electrostatic latent image formed on its surface by the exposure unit 60, a charging roller 32 for charging the photosensitive member 31, and an electrostatic latent image developed on the photosensitive member 31. Four developing units 33 for developing a toner image through toners of yellow, magenta, cyan, and black colors, an intermediate transfer belt 34, and a first transfer roller. 35 and the second transfer roller 36 are provided. In the following, when it is necessary to distinguish each component according to color, it is distinguished by attaching Y, M, C, and K after the reference numerals that refer to each component.

      The developing unit 33 supplies the toner to the developing roller 37 while rotating in contact with the developing roller 37 and the developing roller 37 in which the toner is supplied to the electrostatic latent image formed on the photosensitive member 31. The feed roller 38 is configured to include.

      The intermediate transfer belt 34 is supported by the support rollers 34a and 34b and travels at the same speed as the rotation speed of the photoconductor 31. [ The first transfer roller 35 faces the photoreceptor 31 and allows the developed toner image on the photoreceptor 31 to be transferred to the intermediate transfer belt 34. [ The second transfer roller 36 is provided so as to face the intermediate transfer belt 34. The second transfer roller 36 is spaced apart from the intermediate transfer belt 34 while the toner image is transferred from the photoreceptor 31 to the intermediate transfer belt 34. When the toner image is completely transferred to the intermediate transfer belt 34, And is brought into contact with the transfer belt 34 at a predetermined pressure.

      The fixing unit 40 fixes the toner image to the paper by applying heat and pressure to the paper, and has a heating roller 42 having a heat source 41 for applying heat to the paper to which the toner is transferred, and the heating roller 42. It is provided so as to face the pressure roller 43 is configured to maintain a constant fixing pressure between the heating roller 42.

      On the other hand, the discharge unit 50 is configured to include a series of discharge rollers 51 are sequentially installed to transport the paper passing through the fixing unit 40 to the outside of the main body 10.

      The operation of the image forming apparatus having such a configuration will be briefly described as follows. Light corresponding to, for example, yellow color image information is radiated from the exposure unit 60 to the photosensitive member 31 charged at a uniform electric potential by the charging roller 32, and the photosensitive member 31 is applied to an image of yellow color. The corresponding electrostatic point phase is formed. A developing bias is applied to the developing roller 37 of the yellow developing unit 33Y, a yellow toner is adhered to the electrostatic latent image, and a yellow toner image is developed on the photosensitive member 31. This toner image is transferred onto the intermediate transfer belt 34 by the first transfer roller 35. [

      When the transfer of the yellow toner image of one waste paper is completed, the exposure unit 60 scans, for example, light corresponding to the magenta color image information to the photosensitive member 31 to form an electrostatic latent image corresponding to the magenta color image. Let's do it. The magenta developer 33M supplies magenta toner to develop an electrostatic latent image. The magenta toner image formed on the photosensitive member 31 is transferred to the intermediate transfer belt 34 so as to be superimposed on the yellow toner image which has been transferred first.

      When the above process is also performed for cyan and black colors, a color toner image in which yellow, magenta, cyan and black toner images are overlapped is formed on the intermediate transfer belt 34. The color toner image is transferred to the paper passing between the intermediate transfer belt 34 and the second transfer roller 36, and the image transferred to the paper is fixed to the paper while passing through the fixing unit 40, and the fixing unit 40 Paper passing through) is discharged to the outside by the discharge rollers (51).

      As described above, in the present invention, the plurality of developing units 33Y, 33M, 33C, and 33K operate sequentially. At this time, only the developing roller of the selected developing unit (for example, 33Y) is rotated, and the remaining developing units (for example, not selected) are rotated. , 33M, 33C, 33K) is preferably not rotated. Therefore, a power transmission means for selectively transmitting the power of the drive source 70 (see FIG. 2) to the four developing units 33Y, 33M, 33C, 33K is provided.

      Figure 2 is a view showing the configuration of the power transmission means in the image forming apparatus according to the present invention, Figure 3 is a perspective view showing a partial configuration in Figure 2, Figure 4 is a first spring in the image forming apparatus according to the present invention An exploded perspective view showing the configuration of the clutch.

      As shown in Figures 2 and 3, the power transmission means 100 is interposed between the rotary shaft 110, the rotary shaft 110 and the developer 33 to interrupt the power transmitted to each developer. Four first spring clutches 120 and four interference control parts 130 provided on the rotary shaft 110 so as to correspond to the first spring clutches 120Y, 120M, 120C, and 120K, respectively.

     Each of the first spring clutches 120 has a clutch gear 121. The clutch gear 121Y is connected through the drive source 70 and the power transmission gears 71 and 72, and the clutch gear 121Y and the clutch gear 121M are connected through the power transmission gear 73. In addition, although not shown in the figure, the clutch gear 121C is connected to the driving source 70 through a series of gears, and the clutch gear 121C and the clutch gear 121K are connected through the power transmission gear 74.

      A driving shaft 140 is interposed between the first spring clutch 120 and the developing unit 33, one end of the driving shaft 140 is connected to the first spring clutch 120, and the other end of the driving shaft 140 is a driving gear. 141 is installed. The drive gear 141 is connected to a driven gear (not shown) provided in the developing device 33, and the driven gear (not shown) is connected to driving elements installed in the developing device 33 including the developing roller 37.

      The interference controller 130 determines whether or not interference with the first spring clutch 120 depends on the rotational phase of the rotary shaft 110. Spring clutches interfering with the interference controller block power transmitted to the developer, and The spring clutch which has not interfered transmits power to the present. That is, when the rotation shaft 110 has a specific rotation phase, only the interference control unit 130Y does not interfere with the corresponding first spring clutch 120Y, and the other interference control units 130M, 130C, and 130K correspond to each of them. When interfering with the first spring clutches 120M, 120C, and 120K, power is transmitted only to the yellow developing unit 33Y among the four developing units.

      As shown in FIGS. 2 to 4, the first spring clutch 120 may be formed of a first hub 122 integrally formed with the clutch gear 121 and a first hub 122 by the clutch spring 123. The second hub 124 is intermittently connected, and the clutch hub 125 is disposed to surround the clutch spring 123 between the first hub 122 and the second hub 124. The drive shaft 140 is coupled to the second hub 124. Accordingly, when the second hub 124 rotates, the driving shaft 140 rotates to transmit power to the developing unit 33.

      One side of the clutch spring 123 is inserted into the first hub 122, and the other side of the clutch spring 123 is inserted into the cylindrical portion 124a of the second hub 124. In addition, one end 123a of the clutch spring 123 is fixed to the spring fixing groove 125a formed in the clutch hub 125, and the other end 123b of the clutch spring 123 is the plan of the second hub 124. It is fixed to the spring fixing hole 124c formed in the branch portion 124b.

      At one end of the outer circumferential surface of the clutch hub 125, a plurality of locking protrusions 126 are formed along the circumferential direction. 4 shows an example in which two locking protrusions are formed, the number of the locking protrusions may be changed according to design needs. The locking protrusions 126 rotate on a plane perpendicular to the plane in which the interference control unit 130 rotates, and interact with the interference control unit 130 to determine whether power is transmitted through the first spring clutch 120. . It is preferable that the outer circumferential surface of the clutch hub 125 is formed to be inclined so that the diameter of the clutch hub 125 decreases toward the end where the engaging protrusion 126 is formed. This is considered so that the interference control unit 130 that rotates together with the rotary shaft 110 does not directly hit the outer circumferential surface of the clutch hub 125 as possible when entering the area interfered with the engaging projection 126. In addition, according to this configuration, the first spring clutch 120 and the interference controller 130 may be more compactly arranged.

      When the clutch gear 121 rotates in the A direction by receiving the rotational force of the driving source 70, the first hub 122 rotates in the A direction together with the clutch gear 121. At this time, when the interference control unit 130 releases the interference with the locking protrusion 126, the clutch spring 123, which rubs against the first hub 122, is twisted in a direction in which the inner diameter thereof is reduced, and the first hub 122 and the second The outer peripheral surface of the hub 124 is tightened. Then, the rotational force of the first hub 122 is transmitted through the clutch spring 123 so that the second hub 124 rotates together with the first hub 122. However, when the interference control unit 130 interferes with the locking protrusion 126 of the clutch hub 125 and restrains the movement of the clutch hub 125, the clutch spring 123 may be removed even if the first hub 122 rotates in the A direction. The outer circumferential surfaces of the first hub 122 and the second hub 124 may not be tightened. Accordingly, only the first hub 122 rotates idling and power is not transmitted to the second hub 124.

      As shown in FIGS. 2 and 3, each of the four interference controllers 130 includes an interference canceling unit 131 formed in a partial region along the rotation direction of the rotary shaft 110, and the interference canceling unit 131. Has an interference portion 132 formed in the region except for.

      The interference control unit 130 sequentially interferes with all four first spring clutches 120 or only one first spring clutch among four first spring clutches 120 according to the rotational phase of the rotary shaft 110. It is designed to release the interference. In this example, the interference canceling unit 131Y and the interference canceling unit 131M have the same phase in this example, and the interference canceling unit 131C is -72 ° (θ1) with respect to the interference canceling unit 131Y (rotation shaft ( The direction opposite to the rotation direction of the rotation direction 110 is defined as the negative direction), and the interference canceling unit 131K has a -216 ° (θ2) phase difference with respect to the interference canceling unit 131Y. . However, the present invention is not limited thereto. If the interference control unit 130 can release the interference on the four first spring clutches 120 sequentially according to the rotational phase of the rotary shaft 110, the design may be appropriately changed. have. That is, the phase difference between the interference cancellers 131 may be appropriately designed according to the arrangement state of the first spring clutches 120 and the positional relationship between the first spring clutch 120 and the rotary shaft 110.

      The interference unit 132 may be configured of a plurality of interference members 132a which are spaced apart along the rotation direction of the rotation shaft 110. The interference members 132a protrude in a radial direction from the outer circumferential surface of the rotary shaft 110 to interfere with the locking protrusion 126 of the first spring clutch 120 when the rotary shaft 110 rotates. When the interference member 132a interferes with the locking protrusion 126 as described above, even if the first hub 122 is rotated by the driving source 70, the second hub 124 does not rotate, so that power is transferred to the developer 33. Not delivered.

      The interference member 132a is provided to be elastically deformable so as to pass through the locking protrusion 126 without difficulty in a state where the rotating shaft 110 interferes with the locking protrusion 126 of the first spring clutch 120. do. When the rotating shaft 110 rotates while the interference member 132a interferes with the locking protrusion 126, the interference member 132a is bent to some extent and passes through the locking protrusion 126. When 132a passes through the locking protrusion 126, the interfering interference member 132a again interferes with the locking protrusion 126 to restrain the movement of the clutch hub 125.

      In this embodiment, each of the interference units 132 is an example consisting of 17 interference protrusions, the number of the interference protrusions can be appropriately changed according to the design needs.

      The rotation shaft 110 provided with the interference control unit 130 may be driven using a separate motor, but may be driven together by a motor driving the developer 33 as shown in FIGS. 2 and 3. However, since the rotating shaft 110 is rotated only when switching the power transmitted to the developing unit 33, the image forming apparatus has an intermittent part for controlling the power of the driving source 70 transmitted to the rotating shaft 110.

      The intermittent part includes a second spring clutch 150 interposed between the driving source 70 and the rotary shaft 110, and a restraining unit 160 that restricts the second spring clutch 150 to block power transmission. Can be configured. Since the configuration of the second spring clutch 150 is similar to that of the first spring clutch 120, only the features of the second spring clutch 150 will be described below.

      The clutch gear 151 of the second spring clutch 150 is connected to the power transmission gear 75 that is rotated by the driving source 70, and the second hub 154 of the second spring clutch 150 is a rotary shaft ( 110). In addition, on the outer circumferential surface of the clutch hub 155 of the second spring clutch 150, one locking protrusion 156 interacting with the locking member 163 of the binding unit 160 is distinguished from the locking protrusion of the first spring clutch. A second locking projection) is formed. The rotation shaft 110 is in the home position when the restraining unit 160 restrains the second locking protrusion 156. Here, the home position refers to a state in which power is not transmitted to all of the developing units 33 by interfering with each of the first spring clutches 120 corresponding to each of the interference control units 130 provided in the rotary shaft 110.

      The restraining unit 160 includes a bracket 161, an actuator 162 supported by the bracket 161, and a locking position and a second movable position which are operated by the actuator 162 and interfere with the second locking projection 156. It has a locking member 163 to move between the release position spaced apart from the locking projection 156. The locking member 163 is hinged to the bracket 161, and one end of the locking member 163 is provided with a locking step 163a extending toward the second locking projection 156. The other end of the locking member 163 is connected to an elastic member 164 for elastically biasing the other end of the locking member 163 to move the locking step 163a of the locking member 163 to the locking position.

      Therefore, when a current is applied to the actuator 162, the locking member 163 is pulled toward the actuator 162 by the magnetic force, so that the locking step 163a of the locking member 163 is spaced apart from the second locking protrusion 156. Then, the power of the driving source 70 is transmitted to the rotary shaft 110 through the second spring clutch 150 to rotate the rotary shaft 110. On the other hand, if no current is supplied to the actuator 162, the locking jaw 163a is advanced toward the second locking protrusion 156 by the elastic force of the elastic member 164, and thus interferes with the second locking protrusion 156. ) Is disconnected by the second spring clutch 150 so that the rotary shaft 110 does not rotate.

      3 and 5, the operation of the power transmission means in the image forming apparatus according to the present invention will be described.

      3 and 5 (a), when the restraining unit 160 restrains the second locking protrusion 156, the interference member 132a of the interference control unit 130 provided on the rotating shaft 110 is caught. The power is not transmitted to the developing device 33 by interfering with all the devices 126. In this state, as described above, an electrostatic latent image corresponding to, for example, a yellow color is formed on the photosensitive member 31. When a current is supplied to the actuator 162 of the restraining unit 160, the locking jaw 163a of the locking member 163 is spaced apart from the second locking protrusion 156, so that the rotational force of the driving source 70 is rotated. The rotating shaft 110 is transmitted to 110 to rotate at a constant speed in the B direction.

      As shown in FIG. 5 (b), when the rotary shaft 110 rotates 72 °, only one interference canceling unit 131Y releases interference with the locking protrusion 126 of the first spring clutch 120Y, and the remaining interference control unit ( 130M, 130C, and 130K interfere with the first spring clutches 120M, 120C, and 120K through the interference member 132a. Then, only the first spring clutch 120Y transmits the power of the driving source 70 to the yellow developing unit 33Y, thereby developing a yellow color toner image on the photosensitive member 31.

      After the development of the yellow color and the intermediate transfer are completed, the development of the magenta color is performed next. As shown in FIG. 5C, when the rotation shaft 110 rotates 144 °, only the interference canceling unit 131M releases the interference with the locking protrusion 126 of the first spring clutch 120M, and the remaining interference control unit 130Y, 130C and 130K interfere with the first spring clutches 120Y, 120C, and 120K through the interference member 132a. Then, only the first spring clutch 120M transmits the power of the driving source 70 to the magenta developer 33M, thereby developing a magenta toner image on the photosensitive member 31.

      In a similar manner, when the rotating shaft 110 is rotated 216 °, the phenomenon and intermediate transfer for cyan color are started (see FIG. 5 (d)), and when the rotating shaft 110 is rotated 288 °, the color is black. Development and intermediate transfer are started (see FIG. 5 (e)). In addition, when the rotation shaft 110 rotates 360 °, that is, one revolution, the rotation shaft 110 returns to the state as shown in FIG.

      Therefore, as the rotary shaft 110 rotates once, the development and intermediate transfer for yellow, magenta, cyan and black colors are completed, and the color toner image transferred to the intermediate transfer belt 34 through this process is printed on the paper. Finally transferred.

      On the other hand, after completing the printing operation according to the given command cuts off the current supplied to the actuator 162 of the restraining unit 160. Then, the locking member 163 is returned by the elastic force of the elastic member 164 to restrain the second locking projection 156, whereby the rotary shaft 110 is stopped at the home position.

      As described above, the present invention can sequentially transmit power to a plurality of developing devices without controlling the rotation phase of the rotation shaft. In addition, the present invention can determine the home position of the rotary shaft without having a separate sensor.

      Therefore, the configuration of the power transmission means for the phase control and the home position control of the rotary shaft can be prevented from being complicated, and thus, reliable operation can be realized with fewer components.

Claims (9)

An image forming apparatus comprising power transfer means for selectively transferring power of a drive source to a plurality of developing devices, wherein the power transfer means Rotary shaft; and A plurality of first spring clutches interposed between the rotary shaft and the plurality of developing devices for intermittent power transmitted to the plurality of developing devices; and A second spring clutch interposed between the drive source and the rotary shaft; and A restraining unit for restraining power transmission by restraining the second spring clutch; and Provided on the rotary shaft so as to correspond to each of the plurality of first spring clutches, and interfering with all of the first spring clutches or by a first spring clutch of one of the first spring clutches according to a rotational phase of the rotary shaft. Includes; a plurality of interference control unit configured to sequentially cancel the interference only for, The plurality of interference control unit includes a plurality of interference members spaced apart along the rotational direction of the rotary shaft, and an interference canceling unit defined between two interference members in the rotational direction of the rotary shaft, Each of the plurality of first spring clutches includes a locking protrusion disposed on a path in which the interference members rotate, During the rotation of the rotary shaft, When the interference member interferes with the locking projection of the first spring clutch, power transmission to the developing device is blocked, and when the interference releasing unit releases the interference with the locking projection of the first spring clutch, power is transferred to the developing device. When the restraining unit restrains the second spring clutch and the rotation shaft is stopped, each of the plurality of interference control units interferes with all of the corresponding first spring clutches, so that power to all the developer is cut off. Image forming apparatus. delete The method of claim 1, And at least two of the interference canceling units have different phases along the rotational direction of the rotary shaft. delete The method of claim 1, And the interference member is elastically deformable along the rotational direction of the rotation shaft. The method of claim 1, The first spring clutch may include a first hub that rotates by receiving power from the driving source; and a second hub that is intermittently connected to the first hub by a clutch spring; and the clutch between the first hub and the second hub. And a clutch hub disposed to surround the spring and having the engaging protrusion formed at one end thereof to interact with the interference control unit. And an outer circumferential surface of the clutch hub is formed to be inclined such that the diameter of the clutch hub decreases toward the end where the engaging protrusion is formed. delete delete The method according to claim 6, And the interference control unit rotates on a plane perpendicular to a plane in which the locking protrusion rotates and interacts with the locking protrusion.

Images