Impact detection device

Abstract

To provide a shock detection device capable of easily and reliably detecting shocks through an inexpensive configuration without using power.SOLUTION: A shock detection device is provided, comprising a mobile body with a mass, a support part, and holding means. The support part has a fixed end for fixing a detection target object and an attachment for attaching the mobile body at a point away from the fixed end in a longitudinal direction, and is designed to deform between the fixed end and the attachment when an acceleration exceeding a certain threshold arises on the mobile body due to a shock applied to the detection target object. The holding means holds the mobile body moved by the deformation of the support part at a movement destination.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 Embodiments of the present invention relate to a shock detection device that detects a shock applied to an image forming apparatus, such as a copying machine or a printer, during transportation of the image forming apparatus. 【Background Art】 【0002】 Image forming apparatuses, such as copying machines and printers installed in workplaces, include a fixing device that heats a toner image transferred onto paper and fixes it to the paper. For example, in order to prevent fire from the fixing device during an earthquake, a technique is known in which vibrations applied to the image forming apparatus are detected and power supply to the fixing device is cut off. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2006-23554 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 An image forming apparatus may be severely damaged due to an external shock during transportation after being shipped from a manufacturing factory. In this case, it is only possible to speculate on the cause of the damage based on the appearance of the packaging material and the state of the damaged part. 【0005】 For this reason, a method of attaching an accelerometer to the image forming apparatus to measure the intensity of the shock can be considered, but it is unrealistic because it takes a great deal of labor and cost to attach an accelerometer to all image forming apparatuses. Also, during transportation, since the image forming apparatus is not in an energized state, it is difficult to detect the presence or absence of a shock using electric power. 【0006】 The problem that the embodiments of the present invention aim to solve is to provide an impact detection device that can easily and reliably detect impacts with an inexpensive configuration and without using electricity. [Means for solving the problem] 【0007】 An impact detection device in one embodiment has mass Formed by magnets A mobile unit and a support unit, pedestal It has the following: The support part is the object to be detected side It has a fixed end and a mounting portion for attaching a moving body midway along its longitudinal direction, spaced apart from the fixed end. When an impact applied to the object to be detected causes the moving body to experience an acceleration exceeding a certain threshold, it deforms between the fixed end and the mounting portion. pedestal teeth, Formed from a magnetic material with fixed ends, The moving body, which has moved due to the deformation of the support part, remains in its moved state. Magnetic attraction by magnetic force To hold. The base is attached to the object to be detected. [Brief explanation of the drawing] 【0008】 [Figure 1] Figure 1 is a perspective view showing an impact detection device according to the first embodiment. [Figure 2] Figure 2 is a perspective view showing the impact detection device from Figure 1 with the moving object removed. [Figure 3] Figure 3 is a perspective view showing the moving part of the impact detection device shown in Figure 1. [Figure 4] Figure 4 is a front view of the impact detection device shown in Figure 1. [Figure 5] Figure 5 is a front view showing the state after the moving body of the impact detection device in Figure 4 experiences an acceleration exceeding the first threshold. [Figure 6] Figure 6 is a perspective view showing the movable body of the impact detection device shown in Figure 1 attached to the second mounting part. [Figure 7] Figure 7 is a front view of the impact detection device shown in Figure 6. [Figure 8] Figure 8 is a front view showing the state after the moving body of the impact detection device in Figure 7 experiences an acceleration exceeding the second threshold. [Figure 9] FIG. 9 is a perspective view showing a state in which the moving body of the impact detection device of FIG. 1 is attached to a third attachment portion. [Figure 10] FIG. 10 is a front view of the impact detection device of FIG. 9. [Figure 11] FIG. 11 is a front view showing a state after an acceleration exceeding a third threshold value has occurred in the moving body of the impact detection device of FIG. 10. [Figure 12] FIG. 12 is a diagram for explaining an attachment example of the impact detection device of FIG. 1. [Figure 13] FIG. 13 is an exploded perspective view showing a pedestal and a support portion of a modified example of the first embodiment. [Figure 14] FIG. 14 is a perspective view showing a further modified example of the support portion of FIG. 13. [Figure 15] FIG. 15 is a perspective view showing an impact detection device according to a second embodiment. [Figure 16] FIG. 16 is a perspective view showing a structure in which a first portion of the housing portion of the impact detection device of FIG. 15 is fixed to the tip of the support portion. [Figure 17] FIG. 17 is an exploded perspective view showing the impact detection device of FIG. 15 disassembled. [Figure 18] FIG. 18 is an exploded perspective view showing the internal structure of the housing portion of the impact detection device of FIG. 15. [Figure 19] FIG. 19 is a perspective view showing a device as an application example of the impact detection device of FIG. 1. [Figure 20] FIG. 20 is a perspective view showing a regulating member of the device of FIG. 19. [Figure 21] FIG. 21 is a front view showing a state in which the device of FIG. 19 is attached to a copying machine. [Figure 22] FIG. 22 is a front view showing a vibration detection state by the device of FIG. 21. [Figure 23] FIG. 23 is a perspective view showing a device as another application example of the impact detection device of FIG. 1. 【Embodiments for Carrying Out the Invention】 【0009】 The embodiments will be described below with reference to the drawings. Note that the drawings used in the following description may be simplified or omitted in order to make the explanation easier to understand. 【0010】 As shown in Figures 1 to 3, the impact detection device 100 according to the first embodiment includes a base 10, a support part 20, and a movable body 30. The impact detection device 100 is used by fixing it to a flat mounting surface 1 of the object to be detected. For example, if the object to be detected is an image forming machine such as a copier or printer, the impact detection device 100 can detect whether the image forming machine has been subjected to an impact large enough to cause damage during transport. In this case, the impact detection device 100 can be attached to a predetermined part of the image forming machine in advance when the image forming machine is packaged and transported by truck or the like. 【0011】 For example, when attaching the impact detection device 100 to the copier 200 shown in Figure 12, it can be fixed to the output tray 201 or to the scanner glass 202. The copier 200 in Figure 12 is an in-cylinder output type copier, so the top surface of the output tray 201 (corresponding to the mounting surface 1) is close to the center of gravity of the copier 200. Therefore, fixing the impact detection device 100 to the output tray 201 makes it easier to detect from which direction the impact was applied to the copier 200. Also, the in-cylinder output type copier 200 has the scanner unit 210 in a cantilevered configuration, so the scanner unit 210 is prone to vertical vibration. Therefore, it is effective to attach the impact detection device 100 to the scanner unit 210, which is the most susceptible to impact. 【0012】 As shown in Figures 1 and 2, the base 10 of the impact detection device 100 is formed of a substantially disc-shaped magnetic material. When attaching the impact detection device 100 to an object to be detected, the base 10 is fixed to the mounting surface 1 of the object to be detected. For fixing the base 10 to the mounting surface 1, for example, double-sided tape can be used. Alternatively, the base 10 may be formed of a magnetic material magnetized in a direction that does not generate a repulsive force with the movable body 30, which will be described later. By forming the base 10 with such a magnet, if the object to be detected is a magnetic material, the impact detection device 100 can be magnetically attracted and fixed to the mounting surface 1. The shape of the base 10 is not limited to a circle. Any means other than those described above may be used to fix the base 10 to the mounting surface 1. 【0013】 The support portion 20 is, for example, made by shaping an elastically deformable metal wire 21. The support portion 20 has a fixed end 22 that is fixed to the center of the base 10. The fixed end 22 is one end of the metal wire 21. The support portion 20 can be fixed, for example, by press-fitting the fixed end 22 into a fixing hole provided on the surface 12 of the base 10. 【0014】 The support portion 20 has a straight portion 23 extending from a fixed end 22 in a direction perpendicular to the surface 12 of the base 10. The support portion 20 has a coil portion 24 continuous with the end of the straight portion 23 opposite to the fixed end 22. The support portion 20 has a wavy portion 25 continuous with the coil portion 24 on the opposite side from the straight portion 23. The support portion 20 has another wavy portion 26 fixed to the tip 240 of the coil portion 24 by welding. The support portion 20 has a structure in which a wavy portion 26, separate from the straight portion 23, coil portion 24, and wavy portion 25 formed by shaping a single metal wire 21, is fixed to the tip 240 of the coil portion 24. 【0015】 The wavy portion 26 is attached symmetrically to the wavy portion 25 with respect to an imaginary line passing through the center of the coil portion 24. There are not limited to two wavy portions 25 and 26; three or more may be provided at equal intervals in the circumferential direction of the tip 240 of the coil portion 24. The two wavy portions 25 and 26 widen as they move away from the tip 240 of the coil portion 24 in the longitudinal direction of the support portion 20. 【0016】 The corrugated portions 25 and 26 alternately have multiple valley portions 251, 252, 253, 261, 262, 263 that are bent toward each other, and multiple peak portions 255, 265 that are bent toward each other. In this embodiment, the corrugated portions 25 and 26 each alternately have three valley portions and four peak portions. The three valley portions 251, 252, 253 of the corrugated portion 25 are located opposite the three valley portions 261, 262, 263 of the corrugated portion 26. These three pairs of valley portions 251, 261, 252, 262, 253, 263 are examples of the "mounting portions" described in the claims of this application. In other words, the impact detection device 100 of this embodiment has three mounting portions along the longitudinal direction of the support portion 20 at different distances from the fixed end 22. 【0017】 As shown in Figure 3, the movable body 30 is, for example, a dodecagonal prism shape with 12 rectangular flat surfaces 32 on its outer circumference. The movable body 30 is formed, for example, from a magnet with a certain mass capable of magnetically attracting a magnetic material. The multiple rectangular flat surfaces 32 on the outer circumference of the movable body 30 only need to include straight edges that contact the flat surface 12 of the base 10 when the support part 20 is deformed to the state shown in Figure 5. The movable body 30 can be polygonal, and the number of flat surfaces 32 on its outer circumference is not limited to 12. The movable body 30 may also be a polygonal pyramidal shape, and only needs to be a shape that does not roll on the surface 12 of the base 10 when magnetically attracted to the surface 12 of the base 10, as shown in Figure 5. 【0018】 Alternatively, the movable body 30 may be formed in a disc shape, for example, without a flat surface, and a plurality of recesses may be provided on the surface 12 of the base 10 to hold the movable body 30 in a way that prevents it from rolling. In this case, the recesses may be arranged in the circumferential direction on the surface 12 of the base 10. The recesses should have a shape that allows the movable body 30 to fit into the recesses without rolling on the surface 12 of the base 10 after it has been magnetically attracted to the base 10. For example, the recesses may have an arc-shaped bottom surface with the same curvature as the disc-shaped movable body 30. 【0019】 The movable body 30 has a rectangular fixing hole 34 in its center that penetrates the movable body 30. The cross-section of the fixing hole 34, which is perpendicular to the axial direction of the movable body 30, is a rectangle that is elongated in one direction. When attaching the movable body 30 to the support part 20, the two corrugated portions 25 and 26 of the support part 20 are slightly elastically deformed in a direction that brings them closer together, the free ends of the two corrugated portions 25 and 26 are inserted into the fixing hole 43 of the movable body 30, and the elastic deformation of the two corrugated portions 25 and 26 is returned to its original state. This allows both ends of the fixing hole 34 of the movable body 30 in the longitudinal direction to be fitted into any of the valley portions 251, 252, 253, 261, 262, or 263 of the corrugated portions 25 and 26. The holding force of the movable body 30 by the support part 20 is the restoring force of the two corrugated portions 25 and 26. For example, Figure 2 shows the state before the movable body 30 is attached to the support part 20, and Figure 1 shows an example of the state after the movable body 30 has been attached to the support part 20. Since the movable body 30 has a fixing hole 34 with a rectangular cross-section, it does not rotate relative to the support part 20 when attached to the support part 20. 【0020】 As described above, the support section 20 has three mounting sections. Figures 1, 4, and 5 show the movable body 30 attached to a pair of valley sections 251 and 261 (hereinafter referred to as the first mounting sections 251 and 261) located at the position furthest from the fixed end 22 along the longitudinal direction of the support section 20. Figures 6 to 8 show the movable body 30 attached to a pair of valley sections 252 and 262 (hereinafter referred to as the second mounting sections 252 and 262) that are closer to the fixed end 22 than the first mounting sections 251 and 261. Figures 9 to 11 show the movable body 30 attached to a pair of valley sections 253 and 263 (hereinafter referred to as the third mounting sections 253 and 263) that are closest to the fixed end 22. In other words, the movable body 30 can be attached to any one of the multiple mounting sections located at different distances from the fixed end 22 of the support section 20. 【0021】 For example, in the state shown in Figure 4, where the movable body 30 is attached to the first mounting parts 251 and 261, if an impact is applied to the object to be detected, an acceleration of direction and magnitude based on this impact occurs in the movable body 30. When a strong acceleration in a certain direction occurs in the movable body 30, the support part 20 to which the movable body 30 is attached bends and deforms between the fixed end 22 and the first mounting parts 251 and 261. The deformation of the support part 20 occurs mainly in the straight portion 23, but the coil portion 24 also bends slightly. Since the support part 20 has its fixed end 22, which is the end of a single metal wire 21, fixed perpendicularly to the base 10, it can deform in all directions around the fixed end 22. 【0022】 When the acceleration generated in the moving body 30 exceeds a certain threshold, the support part 20 deforms significantly to the state shown in Figure 5, and the moving body 30 comes into contact with the surface 12 of the base 10. The threshold of acceleration that causes the moving body 30 to come into contact with the surface 12 of the base 10 is defined as the first threshold. As shown in Figure 5, the moving body 30, having come into contact with the surface 12 of the base 10, is magnetically attracted to the surface 12 of the base 10 with a force stronger than the restoring force of the support part 20. Therefore, the moving body 30, in the state of being magnetically attracted to the surface 12 of the base 10, maintains that state after the acceleration generated in the moving body 30 has disappeared. In other words, in this case, the base 10 functions as a "holding means" as described in the claims of this application, and holds the moving body 30, which has moved due to the deformation of the support part 20, in its moved state. Furthermore, since the movable body 30 has the aforementioned multiple flat surfaces 32 on its outer circumference, it does not roll along the surface 12 of the base 10 while magnetically attached to it. 【0023】 Furthermore, as shown in Figures 6 and 7, when the object to be detected is subjected to an impact while the mobile body 30 is attached to the second mounting parts 252 and 262, if an acceleration exceeding a certain threshold is generated in the mobile body 30, the support part 20 deforms to the state shown in Figure 8, and the mobile body 30 is magnetically attracted to the surface 12 of the base 10. The threshold value of the acceleration at this time is greater than the first threshold value described above, and this threshold value is set as the second threshold value. 【0024】 Similarly, as shown in Figures 9 and 10, when the object to be detected is subjected to an impact while the mobile body 30 is attached to the third mounting parts 253 and 263, if an acceleration exceeding a certain threshold is generated in the mobile body 30, the support part 20 deforms to the state shown in Figure 11, and the mobile body 30 is magnetically attracted to the surface 12 of the base 10. The threshold value of acceleration at this time is even greater than the second threshold value described above, and this threshold value is designated as the third threshold value. 【0025】 In other words, according to this embodiment, the magnitude of the impact detectable by the impact detection device 100 can be changed by changing the mounting position of the movable body 30 with respect to the support part 20. When the movable body 30 attached to the first mounting parts 251 and 261 is magnetically attracted to the base 10, it can be detected that an impact has been applied to the object to be detected that causes an acceleration exceeding a first threshold to occur in the movable body 30. When the movable body 30 attached to the second mounting parts 252 and 262 is magnetically attracted to the base 10, it can be detected that an impact has been applied to the object to be detected that causes an acceleration exceeding a second threshold to occur in the movable body 30. When the movable body 30 attached to the third mounting parts 253 and 263 is magnetically attracted to the base 10, it can be detected that an impact has been applied to the object to be detected that causes an acceleration exceeding a third threshold to occur in the movable body 30. For example, if you want to detect whether a relatively strong impact has been applied to the object to be detected, you can attach the mobile body 30 to the third mounting parts 253 and 263, and if you want to detect whether a relatively weak impact has been applied to the object to be detected, you can attach the mobile body 30 to the first mounting parts 251 and 261. 【0026】 As described above, the impact detection device 100 according to the first embodiment can easily and reliably detect whether or not an impact has been applied to the object to be detected, without using electricity and with a relatively inexpensive configuration. In other words, according to this embodiment, the user can determine whether or not a large impact has been applied to the object to be detected simply by checking whether or not the movable body 30 is magnetically attached to the base 10. Furthermore, since the movable body 30 has multiple flat surfaces 32 on its outer circumference, it does not roll around while magnetically attached to the base 10, and the direction in which the impact was applied to the object to be detected can be determined from the position in which the movable body 30 is magnetically attached to the base 10. 【0027】 Furthermore, according to this embodiment, the position where the movable body 30 is attached to the support part 20 (first mounting parts 251, 261, second mounting parts 252, 262, or third mounting parts 253, 263) can be changed, so the magnitude of the detectable impact when detecting the presence or absence of an impact applied to the object to be detected can be changed in stages, allowing for operation according to the application. In addition, if several types of movable bodies 30 with different masses are prepared in advance, the magnitude of the impact to be detected can be finely adjusted. 【0028】 Furthermore, according to this embodiment, the movable body 30, which is magnetically attached to the base 10, can be detached from the base 10 and returned to its original state, so the impact detection device 100 that has been attached to the object to be detected and used once can be reused. If the base 10 is made of magnets so that it is magnetically attached to the object to be detected which is made of a magnetic material, the same impact detection device 100 can be reused any number of times. If reuse is not necessary, the support part 20 may be made of a material that deforms plastically instead of a material that deforms elastically. 【0029】 In this embodiment, the case in which the base 10 that generates a magnetic attractive force with the movable body 30 is used as a holding means to keep the movable body 30 in the state in which it is magnetically attached to the base 10 has been described. However, the embodiment is not limited to this, and for example, the movable body 30 may be held to the base 10 using other means such as hook-and-loop fasteners. Furthermore, if the object to be detected is a magnetic material and the movable body 30 is a magnet, the base 10 may be omitted, and the movable body 30 may be directly attracted to the mounting surface 1 of the object to be detected. In this case, the object to be detected will function as a holding means. In this case, in order to fix the fixed end 22 of the support part 20 to the mounting surface 1, a fixing member such as a suction cup may be provided on the fixed end 22. 【0030】 Alternatively, as shown in the modified example in Figure 13, a fixing coil 28 may be provided at the fixed end 22 of the support portion 20 to fix the fixed end 22 of the support portion 20 to the base 10. In this case, the fixing coil 28 is provided on the opposite side of the coil portion 24, with the straight portion 23 of the support portion 20 in between. The fixing coil 28 can be formed from a single metal wire 21, along with the straight portion 23, the coil portion 24, and the corrugated portion 25. The base 10 is provided with a stud 14 into which the fixing coil 28 is fitted. The stud 14 is fixed to the base 10, for example, by inserting it into a mounting hole 101 provided in the center of the base 10 and crimping it on the back side of the base 10. The inner diameter of the fixing coil 28 is slightly smaller than the outer diameter of the stud 14, and the stud 14 is pressed into the fixing coil 28 to fix it. 【0031】 In the modified support portion 20 described above, a fixed coil 28 is provided separately from the coil portion 24. However, as shown in Figure 14, for example, the straight portion 23 may be eliminated and a coil portion 29 formed by integrating the two coil portions may be provided. In this case, for example, the inner diameter of the coil portion 29 may be made slightly smaller than the outer diameter of the stud 14, and the stud 14 may be press-fitted into the fixed end 22 of the coil portion 29 to fix the support portion 20 to the base 10. 【0032】 Next, with reference to Figures 15 to 18, the impact detection device 300 according to the second embodiment will be described. As shown in Figure 15, the impact detection device 300 includes a base 310, a support portion 320, and a housing portion 330. The base 310 has the same structure as the base 10 with the stud 14 shown in Figure 13. The support portion 320 has a fixed end 322 at its base end for fixing to the stud 14 of the base 310. As shown in Figure 16, the fixed end 322 of the support portion 320 has a bottomed hole 321 into which the stud 14 is press-fitted. The support portion 320 is an elastically deformable rod-shaped member. The support portion 320 is fixed to the surface 312 of the base 310 approximately perpendicularly. The housing portion 330 is fixed to the tip of the support portion 320 spaced apart from the fixed end 322. The housing portion 330 has an outer shape that is approximately octagonal prism-shaped. The housing portion 330 is not limited to an octagonal prism shape; it may be polygonal prism-shaped. 【0033】 As shown in Figures 16 to 18, the housing section 330 has two housing chambers 331 and 332 inside for housing the movable body 340. The two housing chambers 331 and 332 are located at different distances from the fixed end 322 of the support section 320. The number of housing chambers is not limited to two; three or more may be provided. The movable body 340 is, for example, a spherical magnet having a predetermined mass. The movable body 340 is housed in one of the multiple housing chambers. The housing chambers 331 and 332 are spherical spaces with a diameter slightly larger than the movable body 340. The shapes of the housing chambers 331 and 332, and the shape of the movable body 340 are not limited to spherical; they may be any similar shape that allows them to be loosely fitted together. 【0034】 The housing section 330 has a first portion 333 fixed to the tip of the support section 320 and a second portion 334 that joins with the first portion 333. The first portion 333 and the second portion 334 are formed of, for example, resin. The joining surface 3330 of the first portion 333 facing the second portion 334 has two hemispherical recesses 3311 and 3321. The joining surface 3340 of the second portion 334 facing the first portion 333 has two hemispherical recesses 3312 and 3322 that are opposite to the two recesses 3311 and 3321 of the first portion 333. When the joining surface 3330 of the first portion 333 and the joining surface 3340 of the second portion 334 are brought into contact and the first portion 333 and the second portion 334 are joined, two spherical housing chambers 331 and 332 can be provided inside the housing section 330. 【0035】 The joint surface 3330 of the first part 333 has four fixing holes 3331. The joint surface 3340 of the second part 334 has four press-fit pins 3341 that are opposite to the four fixing holes 3331 of the first part 333. The movable body 340 is housed in one of the two housing chambers 331, 332, and the four press-fit pins 3341 of the second part 334 are press-fitted into the four fixing holes 3331 of the first part 333. By joining the joint surface 3330 of the first part 333 and the joint surface 3340 of the second part 334, the first part 333 and the second part 334 can be combined to assemble the housing section 330. 【0036】 When the object to be detected is subjected to an impact while the impact detection device 300 with the above structure is fixed to the mounting surface 1 of the object to be detected, acceleration is generated in the housing section 330 that houses the movable body 340. When the acceleration generated in the housing section 330 exceeds a certain threshold, the support section 320 bends and deforms until the housing section 330 contacts the surface 312 of the base 310. When the housing section 330 contacts the base 310, the movable body 340 is magnetically attracted to the base 310, and the housing section 330 is held in contact with the base 310. 【0037】 According to the impact detection device 300 of this embodiment, a moving body 340 with mass can be housed in either of the two housing chambers 331 and 332, which are at different distances from the fixed end 322 of the support part 320. Therefore, in this embodiment as well, similar to the impact detection device 100 of the first embodiment described above, it is possible to easily and reliably detect whether or not an impact has been applied to the object to be detected, and the magnitude of the acceleration to be detected can also be changed in two stages. 【0038】 The impact detection device 100 of the first embodiment can be applied, for example, as a vibration detection device for detecting vibrations applied to an object to be detected. In this case, for example, the device 400 shown in Figure 19, which applies the impact detection device 100, may be attached to the copier 200 shown in Figure 12, so that a warning is displayed on the display panel of the copier 200 when an earthquake occurs. 【0039】 The apparatus 400 in Figure 19 includes a restricting member 410 for restricting the deformation direction of the support portion 20 in one direction. As shown in Figure 20, the restricting member 410 has a circular fixing plate 411 fixed to the surface 12 of the base 10. The fixing plate 411 has a notch 412 extending in one direction for inserting the support portion 20. The restricting member 410 includes two restricting plates 413 and 414 erected on the surface 4111 of the fixing plate 411. The two restricting plates 413 and 414 are on either side of the notch 412. The two restricting plates 413 and 414 are spaced apart from each other and parallel to each other, with a distance between them that allows the support portion 20 to be positioned. The two restricting plates 413 and 414 restrict the deformation direction of the support portion 20 in a direction parallel to the restricting plates 413 and 414. 【0040】 For example, when the device 400 is attached to the copier 200, as shown in Figures 21 and 22, the device 400 is mounted in a position where the moving body 30 obstructs the sensor's light beam L when the support part 20 deforms. The direction of deformation of the support part 20 is adjusted by the orientation of the restricting member 410. The sensor can be, for example, a paper transport detection sensor, and any sensor having a light-emitting part and a light-receiving part is acceptable. 【0041】 When vibration is applied to the copier 200 to which the device 400 is attached, and acceleration is generated in the moving body 30, the support part 20, whose deformation direction is restricted by the restricting member 410, deforms from the state in Figure 21 to the state in Figure 22, and the moving body 30 blocks the light ray L of the sensor. As a result, the sensor output becomes dim, and it is possible to detect that vibration has been applied to the copier 200. 【0042】 As an example of application to a vibration detection device, for example, the device 500 shown in Figure 23 may be used. This device 500 has two wavy sections 25 and 26 fixed to a base 10 with one end spaced apart from each other, and is used by attaching a movable body 30 in the middle of the wavy sections 25 and 26. Similar to the first embodiment, when the movable body 30 is attached in the middle of the wavy sections 25 and 26, the direction in which the wavy sections 25 and 26 deform when acceleration occurs in the movable body 30 due to vibration is restricted to a certain direction. In other words, the wavy sections 25 and 26 cannot deform in the direction of their alignment, but deform in a direction perpendicular to the direction of alignment. Therefore, when the wavy sections 25 and 26 bend and deform in this direction, the device 500 should be attached in a position where the movable body 30 blocks the sensor's light ray L. 【0043】 Although several embodiments of the present invention have been described above, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. The invention described in the original claims of this application is listed below. [1] A moving object with mass, A support portion having a fixed end for fixing to the object to be detected, a mounting portion for attaching the moving body at a position spaced apart from the fixed end, and a support portion that deforms between the fixed end and the mounting portion when the moving body experiences an acceleration exceeding a certain threshold due to an impact applied to the object to be detected, A holding means for holding the movable body, which has moved due to the deformation of the support portion, in the moved state, An impact detection device having the following features. [2] The aforementioned moving body is a magnetic material, The holding means holds the moving body by magnetic force. [1] The shock detection device described above. [3] The holding means has a base formed of a magnetic material to which the fixed end is fixed, The aforementioned moving body is a magnet, The holding means magnetically attracts the movable body to the base by magnetic force. [1] The shock detection device described above. [4] The support portion is an elastic body that can be deformed in all directions around the fixed end, The movable body is formed in a polygonal shape, with one side being the side that contacts the base when it is in motion. [3] The shock detection device described above. [5] The support portion has a plurality of mounting portions provided at different distances from the fixed end, By changing the mounting portion to which the moving body is attached, the threshold value of the acceleration that deforms the support portion can be changed. [1] The shock detection device described above. [Explanation of symbols] 【0044】 1... Mounting surface, 10... Base, 12... Surface, 20... Support part, 22... Fixed end, 25, 26... Corrugated part, 30... Moving body, 32... Surface, 34... Fixing hole, 100... Impact detection device, 200... Copying machine, 251, 261... First mounting part, 252, 262... Second mounting part, 253, 263... Third mounting part.

Claims

[Claim 1] A moving body formed by a magnet with mass, A support portion having a fixed end on the object to be detected side, a mounting portion for attaching the movable body at a position spaced apart from the fixed end, and which deforms between the fixed end and the mounting portion when the movable body experiences an acceleration exceeding a certain threshold due to an impact applied to the object to be detected, A base to be attached to the object to be detected, which is formed of a magnetic material with the fixed end fixed, and which magnetically attracts and holds the moving body, which has moved due to the deformation of the support part, in its moved state, An impact detection device having the following features. [Claim 2] The support portion is an elastic body that can be deformed in all directions around the fixed end, The movable body is formed in a polygonal shape, with one side being the side that contacts the base when it is in motion. The impact detection device according to claim 1. [Claim 3] The support portion has a plurality of mounting portions provided at different distances from the fixed end, By changing the mounting portion to which the moving body is attached, the threshold value of the acceleration that deforms the support portion can be changed. The impact detection device according to claim 1.

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